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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Acetylcholine
A key chemical in neurons (nerve cells) that acts as a neurotransmitter and carries information across the synaptic cleft, the space between two nerve cells. Abbreviated ACh
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Show more- Caseous Cheeselike. In caseous lymphadenitis, the lymph nodes turn into a soft, dry, crumbly mass resembling cheese…
- Straight jacket See: Straitjacket
- Faciodigitogenital dysplasia See: Aarskog-Scott syndrome
- Pregnancy Pregnancy: The state of carrying a developing embryo or fetus within the female body. This condition can be…
- Methionine An amino acid, one of the 20 building blocks of protein. A dietary essential amino acid, methionine provides…
- Acrocentric chromosome A chromosome (one of the microscopically visible carriers of the genetic material DNA) with its centromere…
- Nephrolith A kidney stone
- Restriction enzyme An enzyme from bacteria that can recognize specific base sequences in DNA and cut the DNA at that site (the…
- Allergy Allergy: A misguided reaction to foreign substances by the immune system, the body system of defense against…
- Saphenous vein The saphenous veins -- there are two, the great and the small saphenous veins - serve as the principal veins…
- VER Visual evoked response. A type of electrophysiologic retinal testing
- Accommodation In medicine, the ability of the eye to change its focus from distant to near objects (and vice versa). This…