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).
Hair follicle
A sac from which a hair grows and into which the sebaceous (oil) glands open. The follicle is lined by cells derived from the epidermal (outside) layer of the skin. Each follicle normally goes through a five-year cycle of growth and rest…
Read the definitionRandom terms
Show more- Hormone, secretin Hormone made by glands in the small intestine that stimulates pancreatic secretion. The word 'hormone' was…
- Intervertebral foramen An opening between vertebrae through which nerves leave the spine and extend to other parts of the body. Also…
- Pneuma The life-giving principle. According to the school of medicine in ancient Alexandria, life was associated…
- Vaccine, inactivated polio See: Polio vaccine, inactivated
- LSD Lysergic acid diethylamide, an hallucinogen. LSD is an abbreviation of the German term…
- Retrovirus An RNA virus (a virus composed not of DNA but of RNA). Retroviruses have an enzyme called reverse…
- Failure, heart Inability of the heart to keep up with the demands on it and, specifically, failure of the heart to pump…
- BAEP (brainstem auditory evoked potentials) See: ABR test
- CABG, off-pump See: Off-pump CABG
- Voiding cystourethrogram A test done to examine the bladder and urethra while the bladder fills and empties. A radiopaque liquid (that…
- Nephrogenic rest A fragment of embryonic tissue in the kidney retained after the period of embryonic development. Nephrogenic…
- Acral-lentiginous melanoma See: Melanoma, acral-lentiginous