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).
Eye bleed
Medically called a subconjunctival hemorrhage. A very common cause of a painless bloody eye usually first noticed by somebody else or by the person with it when they look in the mirror. The bleeding results from a break in a small blood…
Read the definitionRandom terms
Show more- Penis, erection of the When the penis fills with blood and is rigid. The penis contains two chambers, called the corpora cavernosa…
- Leukemia, juvenile myelomonocytic leukemia See: Juvenile myelomonocytic leukemia
- Homosexual A person sexually attracted to persons of the same sex. Homosexuals include males (gays) and females…
- Orthorexia nervosa A term designating a disorder in which there is an unhealthy obsession with healthy eating, an extreme…
- Laryngeal stenosis Narrowing or constricting of the larynx, the voice box
- Phenylalanine An essential amino acid. (The human body cannot make it so it is essential to the diet.) Phenylalanine that…
- Compound fracture A fracture in which the bone is sticking through the skin. Also called an open fracture. NTER> Note that a…
- Sixth cranial nerve The sixth cranial nerve is the abducent nerve, a small motor nerve that has one task: to supply a muscle…
- Hypoplastic left heart syndrome A form of congenital heart disease in which the whole left half of the heart (including the aorta , aortic…
- Venous catheter, central See: Catheter, central venous
- Achlorhydria A lack of hydrochloric acid in the digestive juices in the stomach (in technical terms, so that the pH of the…
- Agent, antiviral An agent that kills viruses or suppresses their replication and, hence, inhibits their capability to multiply…