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).
Principal investigator
In biomedical research, the person who directs a research project or program. The principal investigator (the PI) usually writes and submits the grant application, oversees the scientific and technical aspects of the grant, and has…
Read the definitionRandom terms
Show more- Immunization, HIB This immunization is designed to prevent diseases caused by Haemophilus influenzae type B (HIB), a bacteria…
- P.r.n. Abbreviation meaning 'when necessary' (from the Latin 'pro re nata', for an occasion that has arisen, as…
- Erythrasma A chronic superficial slowly spreading skin infection, especially in the folds of the body and webs between…
- Foot-drop brace See Ankle-foot orthosis
- Test, NSE Neuron-specific enolase (NSE) is a substance that has been detected in patients with certain tumors, namely…
- Social phobia Excessive fear of embarrassment in social situations that is extremely intrusive and can have debilitating…
- Myringotomy A surgically placed tiny incision in the eardrum. Any fluid behind the eardrum can then drain and usually…
- Sinus arrhythmia The normal increase in heart rate that occurs during inspiration (when you breathe in). This is a natural…
- Cerebellar Pertaining to the cerebellum, the part of the brain in the back of the head between the cerebrum and the…
- Breech birth Literally, delivery of the baby by the buttocks first, rather than the head as is usual. Breech birth is more…
- Homogentisic acid oxidase deficiency Alkaptonuria
- Immunization, German measles Measles: See Immunization, MMR