MedicalVocabulary.org
Medical vocabulary with 16,436 clear, complete and reliable definitions.
About MedicalVocabulary.org
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).
H
Symbol for hydrogen
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Show more- Congenital central hypoventilation syndrome Failure from birth of central nervous system control over breathing while asleep. There are usually no…
- Geiger counter The most commonly used portable radiation detection and measuring instrument, consisting of a gas-filled tube…
- Plague Plague: The plague is an infectious disease due to a bacteria called Yersinia pestis. Y. pestis mainly…
- Window, round The trachea, a tube-like portion of the respiratory (breathing) tract that connects the larynx (the voicebox)…
- Disordered thinking A failure to be able to 'think straight.' Thoughts may come and go rapidly. The person may not be able to…
- Saccular From the Latin 'sacculus' meaning a small pouch. As for example the alveolar saccules (little air pouches)…
- Pasteur Institute A non-profit private foundation which contributes to the prevention and treatment of disease, primarily…
- Mutation, nonsense A mutation (a change) in a base in the DNA that prematurely stops the translation (reading) of messenger RNA…
- Urge incontinence A sudden involuntary contraction of the muscular wall of the bladder causing urinary urgency, an immediate…
- Flexner Report 'Medical Education in the United States and Canada', quite possibly the most important written document in…
- Ca The symbol for calcium
- Pilonidal cyst A special kind of abscess that occurs in the cleft between the buttocks. Forms frequently in adolescence…