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).
Gene duplication
An extra copy of a gene. Gene duplication is a key mechanism in evolution. Once a gene is duplicated, the identical genes can undergo changes and diverge to create two different genes. A duplication is the opposite of a deletion…
Read the definitionRandom terms
Show more- Myeloproliferative disorders Malignant diseases of certain bone marrow cells including those that give rise to the red blood cells, the…
- Anterior pituitary The front portion of the pituitary, a small gland in the head called the master gland. Hormones secreted by…
- Pimply Having pimples. Papuliferous and papilliferous are fancy words for what is simply pimply
- Eyes, flashing lights in the There are a number of causes of spontaneous flashing light sensations in the eye. A sensation of flashing…
- Amine A chemical compound containing nitrogen. Amines are derived from ammonia. (The name 'amine' was derived from…
- Polyp colon family history See: Colon cancer family history
- Upper GI series Upper GI series: A series of x-rays of the esophagus, stomach, and small intestine (upper gastrointestinal…
- Salmonella Salmonella: A group of bacteria that cause typhoid fever and a number of other illnesses, including food…
- Quaque die (on prescription) Seen on a prescription, qd (or, written with periods, q.d.) means one a day (from the Latin quaque die). The…
- French paradox A small structure that has a restraining function. For example, the lingual frenulum attaches the tongue to…
- Brachial neuritis Inflammation of nerves in the arm causing muscle weakness and pain
- Syndrome, Aarskog See: Aarskog-Scott syndrome