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.
- 100% free
- No registration
- No intrusive ads
- Privacy by design
- Mobile friendly
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).
Allergic reaction
The hypersensitive response of the immune system of an allergic individual to a substance. When an allergen enters the body, it causes the body's immune system to develop an allergic reaction in a person with an allergy to it. This…
Read the definitionRandom terms
Show more- Osteochondroma An abnormal, solitary, benign growth of bone and cartilage, typically at the end of a long bone…
- WF Abbreviation for 'white female' used by doctors as shorthand when jotting down the results of their physical…
- RDS (respiratory distress syndrome) Formerly known as hyaline membrane disease, a syndrome of respiratory difficulty in newborn infants caused by…
- Attenuate To weaken, dilute, thin, reduce, weaken, diminish. The use of 'attenuate' in medicine is not new. In the 16th…
- Error, alpha The statistical error (said to be 'of the first kind' or type I) made in testing an hypothesis when it is…
- Bernard-Soulier syndrome Nt platelet syndrome): The Bernard-Soulier syndrome is a primary problem of platelets in which the platelets…
- Behcet's disease See: Behcet's syndrome
- Inversion, chromosome A chromosome segment is clipped out, turned upside down and reinserted back into the chromosome. A chromosome…
- Hyperaldosteronism Overproduction of the hormone aldosterone from the outer portion (cortex) of the adrenal gland or a tumor…
- Bee sting, Africanized All stings from bees (and other large stinging insects such as yellow jackets, hornets and wasps) can trigger…
- HCV PCR HCV PCR (polymerase chain reaction) is a test for the hepatitis C virus (HCV). There are three types of HCV…
- Caudal An anatomic term meaning 1. Pertaining to the tail or the hind part. 2. Situated in or directed toward the…