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).
Nicotinic acid
Deficiency of nicotinic acid (also known as niacin), one of the B-complex vitamins, causes pellagra. Pellagra was known as the 'disease of the four D's' -- dermatitis, diarrhea, dementia and death. The disease is specifically characterized…
Read the definitionRandom terms
Show more- Fever, hemorrhagic A number of diseases characterized by an abrupt onset of high fever and chills, headache, cold and cough, and…
- Numbness (Numb) Coin-shaped patches of irritated skin-most common on the arms, back, buttocks, and lower legs that may be…
- Olefactory Common misspelling of olfactory
- Vertical Passage of a disease-causing agent (a pathogen) vertically from mother directly to baby during the perinatal…
- Lumbar puncture Lumbar puncture: A lumbar puncture or 'LP' is a procedure whereby spinal fluid is removed from the spinal…
- Exstrophy Eversion of a hollow organ at birth. An exstrophic bladder is one that is turned inside out like a rubber…
- Dystocia, shoulder See: Shoulder dystocia
- Health Insurance Portability Accountability Act T: See: HIPAA
- CST3 The gene for cystatin C
- Roux-en-Y gastric bypass Roux-en-Y gastric bypass: A surgical procedure which may be done for severe obesity. The procedure involves…
- Human Genome Organisation The international organization of scientists involved in the Human Genome Project, the global initiative to…
- Hepatitis C PCR See: HCV PCR