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.
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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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Niacin
Niacin: Nicotinic acid, one of the B-complex B vitamins. Deficiency of niacin in the diet results in the disease pellagra. See: Pellagra.
Read the definitionRandom terms
Show more- Colostomy, iliac A colostomy in which the exterior opening (stoma) is located on the lower left side of the abdomen
- Acetylsalicylic acid (aspirin) Acetylsalicylic acid (aspirin): Aspirin is a good example of a tradename that has entered into the language…
- Beriberi A syndrome characterized by inflammation of multiple nerves (polyneuritis), heart disease (cardiopathy), and…
- RT 1. Respiratory therapist.2. Radiation therapy.3. Reverse transcriptase
- Stenosis, aortic Narrowing (stenosis) of the heart valve between the left ventricle of the heart and the aorta. This narrowing…
- Food poisoning Food poisoning: A common flu-like illness typically characterized by nausea, vomiting and diarrhea, due to…
- Hantavirus pulmonary syndrome Acronym for High Altitude Pulmonary Edema, the accumulation in the lungs of extravascular fluid (fluid…
- Disease, Kikuchi A disorder that typically causes 'swollen glands' in the neck (cervical lymphadeniopathy) together with fever…
- Quack 1) A practitioner who suggests the use of substances or devices for the prevention or treatment of disease…
- Arch, vertebral See: Vertebral arch
- Patient-controlled analgesia See: PCA
- Albinism A group of genetic disorders in which there is partial or total lack of the pigment melanin in the eyes…