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).
Reflex
A reaction that is involuntary. The corneal reflex is the blink that occurs with irritation of the eye. The nasal reflex is a sneeze.
Read the definitionRandom terms
Show more- Meter, peak-flow This hand-held device measures air flow (how fast air is blown out of the lungs). Patients can use peak-flow…
- Mucolipidosis I A type of mucolipidosis (see below) characterized by deficiency of the enzyme neuraminidase (sialidase)…
- Xero- Fix): Dry. From the Greek 'xeros' meaning 'dry.' Examples of words containing 'xero-' -- xeroderma is dry…
- Child Health and . . . (NICHD) National Institute of (NICHD): One of the US National Institutes of Health, NICHD is in a sense the NIH for…
- Rosacea keratitis A condition affecting the eyes in about half of all cases of rosacea. It is characterized by burning and…
- Pagon syndrome Congenital anemia with spinocerebellar ataxia (wobbliness). The anemia is characterized by sideroblasts…
- Aneurysm, racemose An aneurysm is a localized widening (dilatation) of an artery, vein, or the heart. At the area of an…
- Lyonization The inactivation of an X chromosome. One of the two X chromosomes in every cell in a female is randomly…
- Anthrax toxin The toxic substance secreted by the bacterium Bacillus anthracis, the causative agent of the disease anthrax…
- Glycemic index An indicator of the ability of different types of foods that contain carbohydrate to raise the blood glucose…
- Prognathism An overly prominent jaw.
- Infection, pinworm An infection caused by a small, white intestinal worm: the pinworm or, more formally, Enterobius…