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).
Meningococcal meningitis
Meningitis: Inflammation of the meninges (the membranes covering of the brain and spinal cord) due to infection with the meningococcus bacterium Neisseria meningitidis. Meningococcal meningitis typically starts like the flu with the sudden…
Read the definitionRandom terms
Show more- Disease, Hirschsprung A congenital abnormality (birth defect) of the bowel in which there is absence of the ganglia (nerves) in the…
- Snellen's chart The familiar eye chart used to measure how well you see at various distances. Snellen's chart is imprinted…
- Amyotrophic lateral sclerosis 3 ALS3. An adult-onset form of amyotrophic lateral sclerosis (ALS) inherited in an autosomal dominant manner…
- Comedo The primary sign of acne consisting of a dilated (widened) hair follicle filled with keratin squamae (skin…
- Pressure urticaria A common type of hives (urticaria) that occurs after the skin has been under pressure, often the feet after…
- Low blood sugar A low blood level of the sugar glucose. Also called hypoglycemia. Hypoglycemia is only significant when it is…
- Five-day fever Fever: Also called trench fever, this is a disease borne by body lice that was first recognized in the…
- Diathesis In medicine, a 'diathesis' is an elegant term for a predisposition or tendency. Thus, a hemorrhagic diathesis…
- Eclampsia Convulsions (seizures) occurring with pregnancy-associated high blood pressure and having no other cause
- ACE (angiotensin converting enzyme) The angiotensins are peptides (substances smaller than proteins) that act as vasoconstricting agents (causing…
- Chondrocalcinosis Calcium in cartilage, usually in a joint, as in osteoarthritis
- Goiter, toxic multinodular Condition in which the thyroid gland contains multiple lumps (nodules) that are overactive and produce excess…