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).
H
Symbol for hydrogen
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Show more- Hemorrhoids Hemorrhoids: See: Hemorrhoid.
- US Department of Agriculture A department of the executive branch of the US government founded in 1862 by President Abraham Lincoln -- he…
- Sicca syndrome An autoimmune disease, also known as Sjogren syndrome, that classically combines dry eyes, dry mouth, and…
- Stroke Stroke: The sudden death of some brain cells due to a lack of oxygen when the blood flow to the brain is…
- HTLV-III The human T-lymphotropic virus type III. An obsolete term for the human immunodeficiency virus or HIV
- Ileocolitis, Crohn Crohn disease involving both the ileum (the furthest part of the small intestine just before the colon) and…
- Mastectomy, modified radical Removal of the breast tissue and the axillary lymph nodes, which are under the arms
- Bromobenzylcyanide A riot control agent or 'tear gas.' See: Riot control agent poisoning
- Shunt, Blalock-Taussig A pioneering heart operation named after the American surgeon Alfred Blalock (1899-1964) and the pediatric…
- Transfusion medicine Blood transfusion and blood conservation are the complementary activities that constitute the clinical arena…
- Vena cava The superior vena cava is the large vein which returns blood to the heart from the head, neck and both upper…
- Complete hysterectomy Hysterectomy: Complete surgical removal of the uterus and cervix. Also called a total hysterectomy.