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).
Sinus bradycardia
A regular but unusually slow heart beat (60 beats/minute or less at rest). Sinus bradycardia can be the result of many things including good physical fitness, medications, and some forms of heart block. 'Sinus' refers to the sinus node…
Read the definitionRandom terms
Show more- Pediatric urine infection See: Urinary tract infection in children
- Topoisomerase A class of enzymes that alter the supercoiling of double-stranded DNA. (In supercoiling the DNA molecule…
- Ulcer An area of tissue erosion, for example, of the skin or lining of the gastrointestinal (GI) tract. Due to the…
- Floppy valve syndrome See: Mitral valve prolapse
- Megalencephaly Also called macrencephaly, a condition in which there is an abnormally large, heavy, and usually…
- Deficiency, iron The most common known form of nutritional disorder in the world, iron deficiency results in anemia because…
- Tubes The 'tubes' are medically known as the Fallopian tubes. There are two Fallopian tubes, one on each side…
- Epinephrine A substance produced by the medulla (inside) of the adrenal gland. The name epinephrine was coined in 1898 by…
- Armed tapeworm Taenia solium
- Flatus Gas in the intestinal tract or passed through the anus. The intestinal gases are hydrogen, nitrogen, carbon…
- Cesarian section, vaginal birth after It was once the rule that, after a C-section, the next delivery also had to be by C-section. Now, vaginal…
- Anteroposterior (AP) In anatomy, AP stands for anteroposterior: from front-to-back. For example, an AP X-ray of the chest is taken…