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).
Headache, vascular
A group of headaches felt to involve abnormal sensitivity of the blood vessels (arteries) in the brain to various triggers, resulting in rapid changes in the artery size due to spasm (constriction). Other arteries in the brain and scalp…
Read the definitionRandom terms
Show more- BRCA2 A gene that normally acts to restrain the growth of cells in the breast and ovary but which, when mutated…
- Dysgraphia A specific developmental disability that affects the person's ability to write. Problems may include…
- Neurotransmitter A chemical that is released from a nerve cell which thereby transmits an impulse from a nerve cell to another…
- Allergy immunotherapy Stimulation of the immune system with gradually increasing doses of the substances to which a person is…
- Infiltrating lobular carcinoma of the breast Breast: Infiltrating lobular carcinoma is the second most common type of invasive breast cancer next to…
- Substance, pressor See: Pressor substance
- AST 1. Aspartate aminotransferase, an enzyme normally present in liver and heart cells. AST is released into…
- Third degree burn See: Burn, third degree
- Exon The region of a gene that contains the code for producing protein. Each exon codes for a specific portion of…
- Karyotyping, flow Use of flow cytometry to analyze and/or separate chromosomes on the basis of their DNA content. Flow…
- Phytochemical The active health-protecting compounds that are found as components of plants. Currently, the terms…
- Acquired Anything that is not present at birth but develops some time later. In medicine, the word 'acquired' implies…