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.
- 100% free
- No registration
- No intrusive ads
- Privacy by design
- Mobile friendly
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).
Sinus arrhythmia
The normal increase in heart rate that occurs during inspiration (when you breathe in). This is a natural response and is more accentuated in children than adults. The 'sinus' refers to the natural pacemaker of the heart which is called…
Read the definitionRandom terms
Show more- Dutch-Kentucky syndrome See: Hecht syndrome
- Heterosexual A person sexually attracted to persons of the opposite sex. Or a person who has sexual relations with the…
- MMR Stands for the measles, mumps, rubella vaccine. The MMR vaccine is now given in two dosages. The first should…
- Nerve, first cranial The first cranial nerve is the olfactory nerve, the nerve that carries impulses for the sense of smell from…
- Crocodile tears syndrome Spontaneous tearing in parallel with the normal salivation of eating. The crocodile tears syndrome occurs…
- Tubercular See: Tuberculous
- Postprandial After mealtime. A postprandial rise in the blood glucose level is one that occurs after eating. Most medical…
- Serratus posterior superior One of the serratus muscles of the back and thorax. The serratus posterior superior originates from the…
- Turban tumor syndrome See: Familial cylindromatosis
- Scrub up To wash the hands and forearms very thoroughly, as before surgery. To scrub up implies the use of a brush…
- Disease, Refsum See Refsum disease
- Acute Of abrupt onset, in reference to a disease. Acute often also connotes an illness that is of short duration…