Glossary

The words medicine assumes you already know, 196 of them, defined plainly.

Who's who in a hospital

APRN: Advanced practice registered nurse. The licensing category covering nurse practitioners, nurse anesthetists, and nurse midwives.
Attending: A fully trained doctor who has finished residency and now practices on their own. The one ultimately responsible for the patient.
Behavioral health technician: Supports patients on a psychiatric or addiction-treatment unit day to day. One of the fastest-growing entry-level clinical roles.
CNA: Certified nursing assistant. Hands-on bedside care: bathing, moving, feeding, and taking vital signs.
CRNA: Certified registered nurse anesthetist. Provides anesthesia care through the nursing training route, which is distinct from an anesthesiologist's physician training.
Department chair: The faculty leader running a hospital or medical school department. Has real influence over hiring, mentorship, and who gets opportunities.
EMT: Emergency medical technician. The person riding the ambulance, treating people where they are and on the way to the hospital.
Hospice: End-of-life care, where the goal has shifted from curing someone to keeping them comfortable.
Hospitalist: A physician who cares for patients only while they are admitted to the hospital, rather than running an outpatient clinic. Most trained in internal medicine or pediatrics.
Medical assistant: The person in a clinic who takes your vital signs, updates your chart, and gets you ready before the doctor comes in. Often shortened to MA.
Nurse practitioner: A registered nurse with graduate training and licensure who can assess, diagnose, treat, and in most states prescribe, within a defined scope.
Patient care technician: A hospital-based version of the CNA role, usually with more clinical tasks and slightly better pay.
PharmD: Doctor of Pharmacy. The graduate degree required to become a licensed pharmacist in the United States.
Phlebotomy: Drawing blood. The person who takes your samples at a lab or bedside.
Physician associate: A licensed clinician trained through a broad medical curriculum and clinical rotations. Its own profession, not a shortened route to becoming a physician.
Postdoc: A researcher doing further training after a PhD, usually before applying for a permanent research or faculty job.
Residency: The three-to-seven years of paid, supervised training after medical school where you learn your specialty.
Resident: A doctor who has finished medical school and is in the several years of supervised training that come next. Still learning, already practicing.
Scribe: Sits in on visits and writes the medical note as it happens, so the physician can look at the patient instead of a screen.
Sonographer: Operates ultrasound equipment to produce the images used for diagnosis, including in pregnancy and for checking organs and blood flow.
Sterile processing: Cleaning and sterilizing surgical instruments. A real job inside a hospital, but with no patient contact.
Surgical technologist: Prepares the operating room, keeps the instruments sterile, and hands tools to the surgical team during an operation.
Unit secretary: Handles paperwork and phones at a nursing station. Inside the hospital, but not a patient-facing role.

Words for the work

Board certification: The exam and ongoing requirements that certify a doctor in their specialty after residency, renewed periodically across a career.
Clinical rotations: Blocks of hands-on training where a student works in different hospital departments under supervision. The second half of medical school is built from these.
Credentialing: The formal check a hospital runs on a clinician's training and licenses before allowing them to practice there.
Differential diagnosis: The ranked list of conditions that could explain a patient’s presentation, which you narrow with history, examination, and testing. Building one is the core skill of clinical reasoning.
Health informatics: The field that builds and runs the computer systems clinicians use to record, share, and analyze patient information.
ICU: Intensive care unit. Where the sickest patients are monitored constantly, sometimes on machines that breathe or maintain blood pressure for them.
Intubation: Placing a breathing tube into the airway so a ventilator can breathe for a patient who cannot.
Perioperative: The stretch of time around an operation: shortly before, during, and shortly after.
Postbaccalaureate: Coursework taken after a bachelor's degree, often to finish prerequisites or to strengthen a record before applying.
Pressors: Medications given through a drip to raise dangerously low blood pressure when the body can no longer hold it up on its own.
Rounds: The daily walk-through where a care team visits its patients together to review how each one is doing and decide what happens next.
Scope of practice: The specific things a licensed clinician is trained, credentialed, and legally allowed to do. Set by education, state law, and employer.
Sepsis: A life-threatening reaction to infection that can shut organs down quickly. Calling a patient septic means they are in that spiral.
NBME: The National Board of Medical Examiners. It writes the Step exams and also sells schools the standardized subject exams many of them use for their own courses.
Spaced repetition: Reviewing material at widening intervals, with the software scheduling each item just before you would forget it. It is how most medical students carry two years of detail.
Shelf exam: A standardized subject exam taken at the end of a clinical rotation in medical school.
Step exams: The national licensing exams doctors sit in stages during and after medical school. Passing them is required to practice.

The MCAT

CARS: The MCAT section that hands you a humanities or social science passage and asks you to reason through it. There is nothing to memorize for it.
Question bank: A large set of practice questions, usually sorted by topic, that you work through and then review. The reviewing is where the learning happens.
Full-length: A complete practice exam taken under real timed conditions. It builds stamina and shows readiness, which is different from learning content.
Diagnostic: A first full-length practice exam taken before serious studying starts, to see where you actually are. It is not a prediction of your final score.
Content review: The part of preparation where you learn or relearn the underlying science, as opposed to practicing questions.
Section Bank: An official AAMC set of practice questions organized by section, sold separately from the practice exams.
Retake: Sitting the MCAT again after an earlier attempt. It costs money and time, and schools can see that you tested more than once.
SDN: A long-running online forum where pre-meds trade advice and rumor about applying. Useful and anxiety-inducing in roughly equal measure.
GPA: Grade point average. The single number used to summarize your grades, usually on a four-point scale.

The application machinery

AACOM: The organization representing osteopathic medical colleges. Not the same thing as AACOMAS, the application service.
AACOMAS: The centralized application service most osteopathic (DO) schools use. The DO counterpart to AMCAS.
AAMC: The Association of American Medical Colleges. Runs the MCAT, the main application system, and publishes what medical schools expect from applicants.
AAMC Fee Assistance Program: A program that substantially reduces MCAT and application costs for applicants from low-income families.
AAMC PREview: The AAMC's own situational-judgment exam, similar in purpose to CASPer. Some schools require it, some accept either.
AAMC traffic rules: The AAMC's rules for how long you may hold more than one acceptance before committing to a single school.
Academic Change Request: The formal route for disputing how AMCAS classified one of your courses. You submit the catalog description to argue the case.
ACGME: The body that accredits every US residency program, for MD and DO graduates alike.
Allopathic: Another name for the MD path, used to distinguish it from the osteopathic (DO) path. Both produce fully licensed physicians.
AMCAS: The centralized application service most MD schools use. You submit once, and it distributes your application to every school on your list.
AO: All Other. Everything on your transcript that isn't biology, chemistry, physics, or math. It counts toward your cumulative GPA but not your science GPA.
BCPM: Biology, chemistry, physics, and math. The application groups these into a separate science GPA, which carries more weight than the cumulative one.
Career-changer post-bacc: A post-baccalaureate program for people who never took the premed prerequisites because they majored in something else. It builds the science record from scratch rather than repairing one.
CASPer: A timed online test where you respond to short scenarios about difficult situations between people. Some schools require it.
Closed-file interview: An interview where the interviewer knows little or nothing about your file going in.
COMLEX: The licensing exam series DO students take, running parallel to the USMLE.
Committee letter: A single letter your college's pre-health office writes on your behalf, usually combining several individual recommendations.
DIY post-bacc: Taking the required undergraduate science courses à la carte at a local or state school instead of enrolling in a formal program. Same effect on your GPA, usually a fraction of the price.
Gap year: A year or more between finishing your degree and starting medical school. Extremely common, and not a mark against you.
Holistic review: Reading an application as a whole person rather than screening on numbers alone. Experiences, attributes, and context are weighed alongside grades and scores.
Institutional action: Any formal action a school took against you: probation, suspension, dismissal. The application asks about it, and you have to report it whether or not it appears on your transcript.
Letter of intent: A letter telling one waitlisted school that you will attend if admitted. It works because it is exclusive, so it goes to exactly one school and only if it is true.
Letter packet: A set of recommendation letters your college collects and sends together, without the single combined evaluation a committee letter adds.
Linkage: An arrangement where a master’s program offers strong performers an inside track to an affiliated medical school. It is conditional on hitting a stated benchmark, not a guaranteed acceptance.
Matriculant: Someone who accepted an offer and actually enrolled, as opposed to everyone who applied. Published statistics usually describe matriculants.
MCAT: The Medical College Admission Test. A long standardized exam most people take junior year of college or later.
MD and DO: The two US physician degrees. Both are fully licensed doctors with the same practice rights; the training differs in emphasis, not in whether you are a real physician.
Mission fit: How well your background and goals line up with what a specific school says it cares about, such as rural medicine or a particular community.
MMI: A run of several short timed interview stations, each with its own scenario and its own scorer, instead of one long conversation.
Most Meaningful: A label the application lets you attach to up to three activities, with extra space to explain why they mattered.
MSAR: The AAMC's database of every MD school's requirements, costs, and admitted-student data. The main tool for building a school list.
NBOME: The organization that writes and runs the COMLEX exams.
OMM: Hands-on techniques DO students learn for assessing and treating problems through touch, mostly in muscles and joints. OMT is the treatment itself.
Open-file interview: An interview where the interviewer has already read your application.
Prerequisites: The specific college courses medical schools require before you can apply, usually biology, chemistry, physics, and often math and English.
Reapplicant: Someone applying to medical school in a cycle after an unsuccessful one. Roughly a quarter of applicants in any given year.
Record-enhancing post-bacc: Undergraduate science coursework taken after your degree to raise a science GPA. Distinct from a career-changer post-bacc, which is for people who never took the prerequisites.
Rolling admissions: Schools review and decide as applications arrive rather than comparing everyone at one deadline. Applying earlier is a genuine advantage.
School designation: Adding one specific school to your application. Each one carries its own fee on top of the base cost.
Seat deposit: Money paid to hold your place after accepting an offer. Anywhere from a few hundred to over a thousand dollars, and often non-refundable.
Shadowing: Following a physician through their working day to observe. You watch rather than help.
SMP: A one-year graduate program, often taken alongside medical students, used to prove you can handle the coursework after a weak undergraduate record.
The Match: The National Resident Matching Program. One computer system places every graduating student into a residency position, and everyone finds out on the same day.
TMDSAS: The application service used by Texas public medical schools. Its own rules, essays, and calendar.
Update letter: A short letter to a school telling it what has genuinely changed since you applied. New facts only; a restatement of enthusiasm is not an update.
USMLE: The licensing exam series MD students take. Required to become licensed and to enter residency.
Verification: The step where the application service checks the coursework you typed in against your official transcripts before schools see your file.
Waitlist: A school's holding list. Not an acceptance, but not a no either, and movement can continue into the summer.
Waiving access: Giving up your right to ever read a letter written about you. Most advisors recommend it, because schools trust an unseen letter more.

Money words

1099: Contractor pay. Nothing is withheld, you owe self-employment tax, and you buy your own benefits. A 1099 number and a W-2 number of the same size are not the same money.
Aggregate loan limit: The total you're allowed to borrow across your whole education, as opposed to in one year. From July 2026 it's $200,000 for a professional program and $257,500 across every federal student loan you've ever taken, undergraduate included.
Capitalization: When unpaid interest gets added to the amount you owe, so from then on you pay interest on the interest. This is what makes a balance grow faster than people expect.
Claims-made: A malpractice policy that covers only claims filed while it's active. Leave the job and the cover for everything you did there ends with it, unless someone buys tail coverage.
Cosigner: Someone who signs a loan alongside you and is legally on the hook if you don't pay. Private lenders often require one from a young borrower with a thin credit file, which is a real barrier if nobody in your family can be asked.
Cost of attendance: A school's official estimate of what a year costs in total, including housing, food, and books, not just tuition. Aid is calculated against it.
Cost of attendance adjustment: A financial aid office's authority to change your official cost of attendance for a documented reason, such as childcare or a medical expense. It has to be asked for, in writing, with documentation.
Deferment: Another way of postponing payments. On unsubsidized loans, interest still accrues.
Disbursement: The moment financial aid is actually paid to your school and the remainder released to you, usually around the start of a term rather than before it.
ERAS: The Electronic Residency Application Service. Where you apply to residency, and the fees are tiered by how many programs you apply to.
FAFSA: The federal form that determines what financial aid you qualify for. Filing it is free, and missing the deadline costs real money.
Forbearance: Pausing loan payments temporarily. Interest usually keeps accruing the whole time, so the pause has a price.
Grace period: The six months after you graduate or drop below half-time before federal loan repayment begins. It is a one-time allowance per loan, so using it after undergrad means it is gone later.
Grad PLUS: A federal loan graduate students used to cover whatever the other federal loans didn't. Eliminated for anyone borrowing for the first time from July 2026, which is why the cap now binds below what medical school costs.
Half-time enrollment: The threshold that keeps federal loans in in-school deferment and usually keeps student health coverage alive. Dropping below it starts several clocks at once.
HPSP: The military's Health Professions Scholarship Program. It pays tuition and a stipend in exchange for a year of active-duty service per year of scholarship.
IHS: The Indian Health Service. Runs a scholarship and a loan-repayment program for physicians who serve American Indian and Alaska Native communities.
In-state tuition: Public universities charge residents of their own state far less than everyone else. The gap is often tens of thousands a year.
Income-driven repayment: Federal repayment plans that set your payment from your income rather than your balance. It's why a resident's loan payment is a few hundred dollars a month rather than a few thousand.
Loans for Disadvantaged Students: A federal loan program administered by participating health-professions schools from a fund they hold, for students from low-income families. Need-based rather than credit-based, 5% interest, and it doesn't accrue while you're enrolled.
Merit aid: Money awarded for your grades, scores, or talents rather than your family's income.
MGMA: The Medical Group Management Association. Runs a widely used physician compensation survey, which is where many published salary figures come from.
MSTP: An NIH-funded MD/PhD program. Tuition is waived and you receive a stipend, in exchange for seven to eight years and a career built around research.
Need-based aid: Money awarded because of your family's finances rather than your grades. Usually does not have to be repaid.
Negative amortization: When your monthly payment is smaller than the interest accruing, so the balance grows even though you pay every month. Common for residents on income-driven plans.
Net price: What you would actually pay once grants and scholarships are subtracted. This is the number that matters.
NHSC: The National Health Service Corps. Pays tuition or repays loans in exchange for practicing in a designated shortage area.
NRMP: The National Resident Matching Program, which runs the Match. Registering and ranking programs both cost money.
OEWS: The Bureau of Labor Statistics' Occupational Employment and Wage Statistics program. One of the two main sources for physician pay data.
Origination fee: A percentage the government takes off the top when a loan is disbursed. You borrow $10,000 and receive slightly less, but you owe the whole $10,000.
Own-occupation: Disability coverage that pays if you can no longer do your own specialty, rather than only if you cannot do any work at all. The distinction is the whole product.
Pell Grant: Federal undergraduate aid for low-income students that you don't repay. It has a lifetime limit, which is why extra semesters can cost more than the tuition.
Primary Care Loan: A school-administered federal loan for medical students at 5%, with no interest accruing during school or during a primary-care residency. In exchange you practice primary care for ten years or until it's repaid.
Professional judgment: A financial aid office's legal authority to override a formula for a documented special circumstance, including adjusting your cost of attendance. It has to be asked for, in writing, with documentation.
PSLF: Public Service Loan Forgiveness. Cancels the remaining federal balance, tax-free, after 120 qualifying payments while employed by a government or non-profit organization. Employed by, not working at: a physician paid on a 1099 by a qualifying hospital earns no months toward it.
RAP: The Repayment Assistance Plan. From July 2026 it's the only income-driven plan open to new federal borrowers. Payments are a percentage of total income, unpaid interest is waived rather than added on, and there's no payment cap when you're an attending.
RVU: Relative value unit. The unit many employers use to measure how much work a doctor generated, and often to calculate their pay.
Satisfactory academic progress: The grade and credit standard you have to keep to stay eligible for federal aid. Dropping below full-time or below a GPA floor can suspend it.
Sticker price: The number on a school's website: tuition, fees, room and board, before anybody helps you. Rarely what a low-income student actually pays.
Tail coverage: What you buy to keep a claims-made malpractice policy covering you after you leave a job. A one-time cost, commonly one and a half to three times the final annual premium, and the most expensive clause most physicians never read.
Underwriting: A lender deciding whether to lend to you, based on credit history and income. Federal student loans mostly skip this. Private ones don't, which is why they're not equally available to everyone.
Unsubsidized loan: A federal loan where interest starts building the day the money arrives, including while you're still in school. Medical school loans are unsubsidized.
W-2: Employee pay. Taxes are withheld for you and benefits usually come with the job.
wRVU: Work relative value unit, the standard measure of what a physician produces. Production pay is a conversion factor multiplied by your wRVUs above a threshold, and who controls those two numbers matters more than the headline salary.

Support, rights, and our shorthand

Articulation agreement: A published document listing which courses at one school transfer as which courses at another. It's public, and it's what protects you when someone's memory of the answer changes.
BLS: The federal agency that publishes US wage and employment data by occupation. The source behind most salary figures you will see quoted.
DACA: Deferred Action for Childhood Arrivals. Discretionary protection from deportation plus work authorization, renewable rather than permanent, and not a path to citizenship.
Employment authorization document: The federal permit that makes it legal to work in the US. Because a resident is a hospital employee, it is what makes residency possible for a DACA recipient.
FLI: This site's shorthand for first-generation, low-income, and immigrant students. The readers the Road is written for.
Leave of absence: A formal, documented pause in enrollment. Every school has a written policy, and the terms of your return are worth getting in writing before you go.
Meaningful clinical experience: Real time with patients. Valued in admissions because it shows you have met the work rather than the idea of it.
Pre-health advising: The campus office that guides students toward health-professions careers. Already paid for by your tuition, and chronically underused.
Pre-med: Not a major. It just means your coursework and experiences are aimed at applying to medical school.
Principal investigator: The faculty member who runs a lab. The person you'd be emailing to ask about joining.
REU: The National Science Foundation's paid summer research programs. Sites are required to recruit heavily from schools with little research of their own, community colleges included.
Technical standards: The functional requirements a school says a student must meet to earn the degree. Published, school-specific, and the thing accommodation requests are assessed against.
Title IX: The federal law requiring schools to respond to sex-based harassment and discrimination. Every college has a designated coordinator whose job this is.
TRIO: A set of federally funded college support programs built specifically for first-generation, low-income, and disabled students.
Tuition equity: A state law letting students pay in-state tuition regardless of immigration status if they meet residency and schooling requirements. Which states have one has changed repeatedly.
Work-study: Federal aid that pays you for a part-time job, often on campus. Research assistantships are sometimes funded this way, which means the lab costs the professor nothing.

Specialty and training words

ABMS: The American Board of Medical Specialties. The umbrella body over the individual specialty boards that certify doctors.
Academic medicine: Working at a university-affiliated hospital, usually mixing patient care with teaching and research. Often pays less than private practice.
AMA: The American Medical Association. The largest US physician membership organization, and a common source of workforce data.
ASC: Ambulatory surgery center. A facility for same-day procedures, outside a full hospital. Often owned partly by the doctors working there.
Attrition: The share of people who leave a training program or the specialty itself before finishing.
Away rotation: A clinical block done at a hospital that is not your own medical school, often to audition at a program you want to match into.
Case mix: The range and complexity of the problems you actually see day to day. Two jobs with the same title can have very different case mixes.
Clerkship: A block of third-year training spent working on one specialty’s clinical service. The core clerkships are where most people actually choose a specialty.
CT: Computed tomography. A scan that builds cross-sectional images from X-rays, used constantly for fast diagnosis.
ED: Emergency department. The part of a hospital that takes anyone who arrives, at any hour, in any state.
Emergency medicine: Emergency medicine. The specialty that staffs the emergency department.
Fee-for-service: Getting paid per procedure or visit rather than a flat salary. Rewards volume, and shapes how a practice runs.
Fellowship: Optional training after residency to subspecialize further. Adds one to three years, and has its own match separate from the main one.
Fill rate: The share of a specialty's residency positions that got filled. A low fill rate means programs went unclaimed, which is unusual.
GI: Gastroenterology, or the gastrointestinal tract, depending on context. The digestive system and the specialty that treats it.
GME: Graduate medical education. The formal name for residency and fellowship training, and for the funding that pays for it.
IMG: International medical graduate. Someone who went to medical school outside the US or Canada. Some specialties take many; others take almost none.
Internal medicine: Internal medicine. Adult general medicine, and the gateway to most medical subspecialties.
Locum tenens: Temporary work filling in at a hospital or practice that is short-staffed. Usually pays well and offers control over your schedule.
Match Day: The third Friday in March, when every matched applicant in the country learns where they will do residency at the same moment.
Match rate: The share of applicants who got a residency spot in that specialty. A low rate means more people wanted it than there were positions.
Moonlighting: Paid clinical work taken on outside your main job or training program, often to reduce debt faster.
OB/GYN: Obstetrics and gynecology. Pregnancy, birth, and the surgical and medical care of the female reproductive system.
OR: Operating room. Time in it is one of the clearest dividing lines between procedural and non-procedural specialties.
PGY: Post-graduate year. PGY-1 is your first year of residency, PGY-2 the second, and so on. It is how training years are counted.
Preclinical: The first stretch of medical school, mostly classroom and lab, before you are working with patients full time. Usually the first year or two.
Private practice: A doctor-owned practice rather than one owned by a hospital or university. More autonomy, more business risk.
Rank-order list: The list of residency programs you submit to the Match, in your true order of preference. An algorithm pairs it against the programs’ lists.
Safety net: A hospital or clinic that cares for people regardless of ability to pay. Usually public, usually underfunded, often where the need is greatest.
Signaling: Telling a limited number of residency programs that they are among your genuine top choices, using tokens the application gives you.
SOAP: The process during Match week that places applicants who did not match into positions that went unfilled. Short, fast, and stressful.
Step 2 CK: Clinical Knowledge. The second US licensing exam, now the main scored one residency programs look at since Step 1 became pass or fail.
Sub-internship: A fourth-year rotation where you carry an intern's responsibilities under supervision. Usually done in the field you are applying to, and treated by programs as an audition.
MSPE: The letter your medical school sends to residency programs summarizing how you did. It quotes clerkship comments and at many schools places you in a band relative to your class.
Dedicated period: The block of weeks a school sets aside for full-time Step study, with no classes and no income.
Remediation: The formal process for making up a failed course or exam in medical school. What it involves, and what ends up on your record, is set by each school's academic standards policy.
Deceleration: Spreading the preclinical curriculum over three years instead of two. Sometimes offered after a failure, sometimes available on request, and it adds a year of tuition and delayed earning.
Subspecialty: A narrower field inside a specialty, entered through fellowship. Cardiology inside internal medicine, for example.