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).
Niemann-Pick disease
A biochemical disorder affecting a lipid (fat) called sphingomyelin, resulting usually in progressive enlargement of the liver and spleen (hepatosplenomegaly), 'swollen glands' (lymphadenopathy), anemia and mental and physical…
Read the definitionRandom terms
Show more- Juvenile melanoma See: Melanoma, juvenile
- Breast development, early The beginning of breast development at puberty is known medically as thelarche. It is now a normal event at…
- Beta error The statistical error (said to be 'of the second kind' or type II) made in testing when it is concluded that…
- Hemolytic jaundice, congenital Jaundice, congenital: Known also as hereditary spherocytosis (HS), this is a genetic disorder of the red…
- Shock, hypovolemic Shock due to a decrease in blood volume. This is the #1 cause of shock. It can be due to loss of blood from…
- Thomas Sydenham See: Sydenham, Thomas
- Serum The clear liquid that can be separated from clotted blood. Serum differs from plasma, the liquid portion of…
- AK 1. Above the knee. 2. Acanthamoeba keratitis. 3. Actinic keratosis
- Typhus, epidemic A severe acute disease with prolonged high fever up to 40° C (104° F), intractable headache, and a…
- Hemorrhage Bleeding or the abnormal flow of blood. The patient may have an internal hemorrhage that is invisible or an…
- Pestis The popular name (and abbreviation) of Positron Emission Tomography.
- Regulatory sequence A sequence of bases in DNA that controls gene expression