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).
Ultraviolet radiation
Invisible rays that are part of the energy that comes from the sun. Ultraviolet radiation can burn the skin and cause skin cancer. Ultraviolet radiation is made up of three types of rays -- ultraviolet A, ultraviolet B, and ultraviolet C…
Read the definitionRandom terms
Show more- Virus A microorganism smaller than a bacteria, which cannot grow or reproduce apart from a living cell. A virus…
- Chemical reaction A process in which one substance is transformed into another. Thousands of different types of chemical…
- Antimicrobial medication A drug used to treat a microbial infection. The term 'antimicrobial' is a general one that refers to a group…
- Laparoscopic assisted vaginal hysterectomy A procedure using laparoscopic techniques to remove the uterus (womb) and/or tubes and ovaries through the…
- Miller-Dieker syndrome A congenital malformation syndrome characterized by lissencephaly ('smooth brain') and a characteristic…
- Anorexia nervosa Anorexia nervosa: See Anorexia.
- Malignancy A tumor that is malignant, that is cancerous, that can invade and destroy nearby tissue, and that may spread…
- Hormone, thyroid stimulating (TSH) A hormone produced by the pituitary gland at the base of the brain in response to signals from the…
- Silencing, gene A mechanism by which cells shut down large sections of chromosomal DNA. Gene silencing is done by…
- Drug resistance The ability of bacteria and other microorganisms to withstand a drug to which they were once sensitive and…
- Paralysis, sleep Sleep: A frightening form of paralysis that occurs when a person suddenly finds himself or herself unable to…
- Hysteroscopy A procedure to see inside the uterus (the womb) using a viewing tube that is inserted into the vagina up…