MedicalVocabulary.org
Medical vocabulary with 16,436 clear, complete and reliable definitions.
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The most complete online medical dictionary: 16,436 terms covering anatomy, physiology, pathologies, diagnostic exams, pharmacology and every clinical specialty.
Designed for 3 kinds of users:
- Patients and family who want to understand a diagnosis, a medical report or instructions from a doctor.
- Students of medicine, nursing, physiotherapy and the health professions, dealing with technical terminology.
- Doctors, pharmacists and healthcare workers who need a quick and reliable reference.
Definitions are written in clear, accessible language while keeping the rigor required for professional use. Each term has a dedicated URL, instant autocomplete search, and can be shared on WhatsApp, Facebook, X and via email with one click.
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Disclaimer: the content is for informational and educational purposes only and does not replace medical advice. If you have doubts about your health, always consult a qualified professional. In case of emergency call your local emergency number (911 in the US, 112 in the EU).
Blockers, beta
A class of drugs that block beta-adrenergic substances such as adrenaline (epinephrine), a key agent in the 'sympathetic' portion of the autonomic (involuntary) nervous system. By blocking the action of the sympathetic nervous system on…
Read the definitionRandom terms
Show more- Itching, anal See: Anal itching
- Basal metabolic rate A measure of the rate of metabolism. For example, someone with an overly active thyroid will have an elevated…
- Suicide and sexual orientation High rates of suicide have consistently been reported among homosexuals, particularly among adolescents and…
- Subglottis The lower part of the larynx just below the vocal cords down to the top of the trachea, which takes air to…
- Homotrisomy Trisomy of the same chromosome. The occurrence of two children in the same family with trisomy 21 is an…
- Distichiasis Double rows of eyelashes. The extra eyelashes grow from glands called the Meibomian glands and may protrude…
- HAVRIX A vaccine against hepatitis A made of killed hepatitis A virus to stimulate the body's immune system to…
- Ceruloplasmin deficiency Lack of the protein ceruloplasmin from the blood and accumulation of iron in the pancreas, liver and brain…
- Third stage of labor The part of labor from the birth of the baby until the placenta (afterbirth) and fetal membranes are…
- Obesity, exogenous Overweight caused by consuming more food than the person's activity level warrants, leading to increased fat…
- Lymphoma, Burkitt See: Burkitt lymphoma
- Pregnancy, ectopic A pregnancy that is not in the usual place and is located outside the inner lining of the uterus. A…