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).
Histidine
An amino acid, one of the 20 building blocks of protein. An essential amino acid, histidine is present in many proteins. Histidine is elevated in the blood and urine in a genetic condition called histidinemia. Decarboxylation of histidine…
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Show more- Meningitis vaccine This term usually refers to a vaccine used to prevent meningococcal meningitis, an inflammation of the…
- Genotoxin A poisonous substance which damages DNA. A genotoxin can cause mutations in DNA (and so be a mutagen), it can…
- Allogeneic graft See: Allograft
- Plegia Suffix meaning paralysis or a stroke. As in cardioplegia (paralysis of the heart), hemiplegia (paralysis of…
- Great pox Syphilis. An old name to distinguish it from the smallpox
- Percutaneous liver biopsy A liver biopsy that is done through the skin with a needle. A percutaneous liver biopsy is in contrast, for…
- TSH Stands for thyroid stimulating hormone, a hormone produced by the pituitary gland at the base of the brain in…
- Antidote An agent that counteracts a poison and neutralizes its effects. A chemical antidote is a substance that…
- Chondrodysplasia, metaphyseal (McKusick type) See: Cartilage hair hypoplasia syndrome
- Electrophoretic Pertaining to electrophoresis, the separation of molecules according to their size and electrical charge by…
- Polysomnography Continuous recording of specific physiologic variables during sleep. Polysomnography typically records brain…
- Ossification The process of creating bone, that is of transforming cartilage (or fibrous tissue) into bone. The human…