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).
Hygiene hypothesis
A hypothesis that states that exposure to allergens in the environment early in life reduces the risk of developing allergies by boosting immune system activity. Conversely, relatively clean environment in early life would sway the immune…
Read the definitionRandom terms
Show more- Drug, antibiotic A drug used to treat bacterial infections. The original definition of an antibiotic was a substance produced…
- Sign Any objective evidence of disease. Gross blood in the stool is a sign of disease. It can be recognized by the…
- Arms An appendage in anatomy and in clinical trials. See: Arm
- Dyshidrotic eczema Irritation of the skin on the palms of hands and soles of the feet characterized by clear, deep blisters that…
- Cyst, pilonidal A special kind of abscess that occurs in the cleft between the buttocks. Forms frequently in adolescence…
- Salvage therapy 1. A final treatment for people who are nonresponsive to or cannot tolerate other available therapies for a…
- Sikimitoxin Poisonous substance found in the Japanese star anise, which is also called sikimi
- Kneecap The medical name for the kneecap is the patella. Whichever name -- kneecap or patella -- you prefer, it is…
- Gastric ulcer A hole in the lining of the stomach corroded by the acidic digestive juices which are secreted by the stomach…
- Fibronectin, fetal See: Fetal fibronectin
- Cardiac insufficiency See: Heart failure
- Periodic breathing Clusters of breaths separated by intervals of apnea (no breathing) or near-apnea. As opposed to normal…