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).
Alkaloid
A member of a large group of chemicals that are made by plants and have nitrogen in them. Many alkaloids possess potent pharmacologic effects. The alkaloids include cocaine, nicotine, strychnine, piperine, caffeine, morphine, pilocarpine…
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Show more- Heterozygous Possessing two different forms of a particular gene, one inherited from each parent. A person who is…
- Paracentesis The removal of fluid from a body cavity using a needle, trocar, cannula, or other hollow instrument. A…
- Gram-negative Gram-negative bacteria lose the crystal violet stain (and take the color of the red counterstain) in Gram's…
- Spinal nerve One of the nerves that originates in the spinal cord. There are 31 pairs of spinal nerves. They consist of…
- NPCR National Program of Cancer Registries
- ER 1. Emergency room. 2. Endoplasmic reticulum. 3. Estrogen receptor. 4. Extended release.
- Off-label use In the United States, the regulations of the Food and Drug Administration (FDA) permit physicians to…
- Antiphospholipid antibody syndrome Antiphospholipid antibody syndrome (APLS): An immune disorder characterized by the presence of abnormal…
- Pectoral muscles Muscles of the 'anterior chest' (the front of the chest). Familiarly called the pecs. The Latin 'pectus'…
- North Asian tick-borne rickettsiosis One of the tick-borne rickettsial diseases of the eastern hemisphere, similar to Rocky Mountain spotted…
- Glisson's capsule The capsule of the liver. A layer of connective tissue surrounding the liver and ensheathing the hepatic…
- WPW syndrome Abbreviation for the Wolff-Parkinson-White syndrome, a condition caused by an abnormality in the electrical…