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).
Upregulation
An increase in the number of receptors on the surface of target cells, making the cells more sensitive to a hormone or another agent. For example, there is an increase in uterine oxytocin receptors in the third trimester of pregnancy…
Read the definitionRandom terms
Show more- Digit, supernumerary An extra finger or toe
- Hypopnea Literally, underbreathing. Breathing that is shallower or slower than normal. Hypopnea is distinct from apnea…
- Syndrome, Waardenburg See Waardenburg syndrome
- Arcus senilis A cloudy opaque arc or circle around the edge of the eye, often seen in the eye of the elderly.
- STL2 Stickler syndrome, type II. See: Stickler syndrome
- Slanted ear An ear that is slanted more than usual. Technically, an ear is slanted when the angle of the slope of the…
- Scalded skin syndrome A potentially serious side effect of infection with the Staph (Staphylococcus) bacteria that produces a…
- Post-thrombotic syndrome The complications that may follow deep vein thrombosis (DVT). The complications after DVT may include…
- Internal pacemaker Pacemaker: A device that uses electrical impulses to regulate the heart rhythm or to reproduce that rhythm…
- EPS Stands for ElectroPhysiologic Study, a test of the electrical conduction system of the heart (the system that…
- Regimen With the accent on the first syllable (reg as in Reggie Jackson), a regimen is a plan, a regulated course…
- Remodelling, chromatin See: Chromatin remodeling