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).
Spectrophotometer
A device which measures the amount of ultraviolet light absorbed by a substance. For example, vitamin A absorbs ultraviolet light so that a spectrophotometer can measure within minutes with almost perfect accuracy the amount of vitamin A…
Read the definitionRandom terms
Show more- L- Abbreviation for levorotatory, applied to a chemical compound, as in l-dopa. Levorotary is opposed to…
- Involute 1. Literally, to turn inward or roll inward. 2. To decrease in size after an enlargement. The uterus…
- Food insecure When people must live with hunger and fear starvation
- Bronchopulmonary segments A subdivision of one lobe of a lung based on the connection to the segmental bronchus. For example, the right…
- Spondylolysis The breaking down (dissolution) of a portion of a bony building block of the spine (a vertebra). The portion…
- Power outage and the heat When power goes out, water purification systems may not be functioning fully. Use bottled water for eating or…
- Prescription drug A drug requiring a prescription, as opposed to an over-the-counter drug, which can be purchased without one…
- Syndrome, premenstrual See Premenstrual syndrome
- Water on the brain Known medically as 'hydrocephalus', this is an abnormal buildup of cerebrospinal fluid (CSF) in the…
- Apolipoprotein E A type of lipoprotein (a protein connected to a fat). Apolipoprotein E is abbreviated ApoE and the gene that…
- Rash Rash: Breaking out (eruption) of the skin. Medically, a rash is referred to as an exanthem.
- French paradox A small structure that has a restraining function. For example, the lingual frenulum attaches the tongue to…