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).
ACE (angiotensin converting enzyme)
The angiotensins are peptides (substances smaller than proteins) that act as vasoconstricting agents (causing blood vessels to narrow). Narrowing the diameter of the blood vessels sends up the blood pressure. ACE converts angiotensin to…
Read the definitionRandom terms
Show more- Obese Well above ones normal weight. A person has traditionally been considered to be obese if they are more than…
- Bone, frontal See: Frontal bone
- Testicular feminization syndrome Now more appropriately called the complete androgen insensitivity syndrome, this is a genetic disorder that…
- Breast cancer, male Breast cancer in a man. Male breast cancer is much less common than breast cancer in women. Fewer than 1% of…
- Saturated fat A fat that is solid at room temperature and comes chiefly from animal food products. Some examples are…
- Notifiable disease See: Reportable disease
- Cervical vertebra, second The second cervical vertebra is called the axis. It is so-named because the uppermost cervical vertebra…
- Quasidiploid Describing a cell that seems to have the usual two full sets of 23 chromosomes, but does not. Many malignant…
- Alactasia Lack of the enzyme lactase which is needed to digest the milk sugar lactose. See: Lactase deficiency
- Diabetes, brittle A type of diabetes when a person's blood glucose (sugar) level often swings quickly from high to low and from…
- Major A major may be an officer in the military but, in a larger sense, it can be anything that is more than…
- Meningitis, meningococcal Meningitis, meningococcal: Inflammation of the meninges (the membranes covering of the brain and spinal cord)…