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).
Anencephaly
A neural tube defect (NTD) that occurs when the cephalic (head) end of the neural tube fails to close, usually between the 23rd and 26th days of pregnancy, resulting in the absence of a major portion of the brain, skull, and scalp. Infants…
Read the definitionRandom terms
Show more- Disease, Niemann-Pick See: Niemann-Pick disease
- Tooth numbering The accordance of a unique number to each tooth. The Universal/National System for permanent (adult)…
- Ammonia A colorless gas with a very sharp odor. Made both by humans and by nature, ammonia dissolves easily in water…
- MRD Minimal residual disease, evidence for the presence of residual malignant cells, even when so few cancer…
- Sinus rhythm The normal regular rhythm of the heart set by the natural pacemaker of the heart called the sinoatrial (or…
- Granulation That part of the healing process in which rough, pink tissue containing new connective tissue and capillaries…
- Granulocyte >Neutrophils have 'neutral' subtle granules; >Eosinophils have prominent granules that stain readily with the…
- Bronchus One of the large air tubes leading from the trachea to the lungs that convey air to and from the lungs. The…
- PID (pelvic inflammatory disease) Despite its seeming lack of gender, this term is applied to women only. PID refers exclusively to ascending…
- Medium-chain acyl-CoA dehydrogenase An enzyme abbreviated as MCAD. See: MCAD deficiency
- Glaucoma, acute angle-closure Glaucoma, acute angle-closure: Increased pressure in the front chamber (anterior chamber) of the eye due to…
- Corneal abrasion A scratch or scrape on the cornea, the clear front window of the eye that transmits and focuses light into…