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).
Hypnic jerk
The common normal phenomenon of jerking awake, usually accompanied by a feeling of falling, just as one is drifting off to sleep. Also called a sleep jerk or sleep start
Read the definitionRandom terms
Show more- Multiple abortions Two or more miscarriages (spontaneous abortions) by a woman. Couples who have had multiple abortions have…
- Dolor 1. Pain, one of the four classic signs of inflammation (together with calor, rubor and tumor). 2. By…
- Olive oil diet See: Mediterranean diet
- Hepatic duct, left See: Left hepatic duct
- Valve, mitral One of the four valves of the heart, the mitral valve is situated between the left atrium and the left…
- Appendix rupture Rupture of appendix
- Lactase deficiency (LDH) An enzyme that catalyzes the conversion of lactate to pyruvate. This is an important step in energy…
- Neuroepithelial Having to do with tissue made up of sensory cells that serve in the reception of external stimuli…
- Appendix epididymis A small cystic projection from the surface of the epididymis which represents a remnant the embryologic…
- Hygiene The science of preventive medicine and the preservation of health. From the name of Hygeia, the daughter of…
- Fragile X tremor/ataxia syndrome Abbreviated FXTAS (pronounced fax-tass). A progressive neurological disorder that strikes men over age 50 and…
- APC (immunology) Antigen-presenting cell, a cell that can 'present' antigen in a form that T cells can recognize it. Among the…