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.
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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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QRS complex
The deflections in the tracing of the electrocardiogram (ECG or EKG), comprising the Q, R, and S waves, that represent the ventricular activity of the heart (the depolarization of the ventricles)
Read the definitionRandom terms
Show more- Histoplasma See: Histoplasma.
- Neurotoxin A substance that causes damage to nerves or nerve tissue. For example, lead is a neurotoxin
- C1 (cervical vertebra) C1 is the first cervical (neck) vertebra which is called the atlas. It supports the head. The atlas bone is…
- Cecum The cecum (also spelled caecum), the first portion of the large bowel, situated in the lower right quadrant…
- Prognosis 1. The expected course of a disease.2. The patient's chance of recovery. The prognosis predicts the outcome…
- Dizziness, anxiety as a cause of One cause of dizziness is overbreathing (hyperventilation) due to anxiety. The overbreathing also causes…
- Immunization, German measles Measles: See Immunization, MMR
- Inbreeding, coefficient of A measure of how close two people are genetically to each another. The coefficient of inbreeding, symbolized…
- Small bowel Another name for the small intestine. The word 'bowel' originated from the Latin 'botulus' meaning 'sausage.'
- Muscle, papillary Small muscles within the heart that anchor the heart valves. The anchor ropes are the chordae tendineae…
- National Heart, Lung, and Blood Institute (NHLBI) One of the National Institutes of Health in the U.S., the NHLBI's mission is to 'provide leadership for a…
- Antiandrogen A drug that blocks the action of androgens (male sex hormones). Antiandrogens are sometimes used in the…