MedicalVocabulary.org
Medical vocabulary with 16,436 clear, complete and reliable definitions.
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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).
Fusiform aneurysm
A vascular outpouching shaped like a spindle. A fusiform widening of an artery or vein. An aneurysm is a localized widening (dilatation) of an artery, vein, or the heart. At the area of an aneurysm, there is typically a bulge and the wall…
Read the definitionRandom terms
Show more- Tarsal tunnel syndrome A type of compression neuropathy (nerve disease due to compression of the nerve) in the ankle and foot…
- Dyskeratosis congenita An inherited cause of bone-marrow failure, dyskeratosis congenita is a syndrome characterized by abnormal…
- Pressure, intraocular The pressure created by the continual renewal of fluids within the eye. The intraocular pressure is increased…
- PCOS Polycystic ovary syndrome
- Reiter syndrome A chronic form of inflammatory arthritis wherein the following three conditions are combined: (1) arthritis…
- Blue baby A baby who is cyanotic (blue), due usually to a heart malformation that prevents the baby's blood from being…
- Methionine An amino acid, one of the 20 building blocks of protein. A dietary essential amino acid, methionine provides…
- Yolk sac Not all yolk has to do with birds' eggs. Human embryos have a yolk sac, too. The human yolk sac is a membrane…
- Sanfilippo syndrome The most common disorder of mucopolysaccharide metabolism, a syndrome in which the onset of clinical…
- Headache, thunderclap A sudden and excruciatingly painful headache. Some doctors feel that in the absence of a known headache…
- In-law A relative by marriage. An in-law is not a biologic relative. This distinction is of importance in a medical…
- Rhinitis, vasomotor Inflammation of the nose (rhinitis) due to abnormal neuronal (nerve) control of the blood vessels in the…