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).
Ad lib
Abbreviation for the Latin 'ad libitum' meaning 'at pleasure' and 'at one's pleasure, as much as one desires, to the full extent of one's wishes.' Sometimes seen on a prescription or doctor's order. For example, during an overnight fast…
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Show more- Riot control agent poisoning Poisoning by an irritant agent that belongs to a class of agents collectively known as riot control agents or…
- Septum, cardiac The cardiac septum is the dividing wall between the right and left sides of the heart. That portion of the…
- Rat-flea typhus Murine typhus, an acute infectious disease with fever, headache, and rash, all quite similar to, but milder…
- Leishmania infection A parasitic disease, also called leishmaniasis, spread by the bite of sand flies infected with a protozoa…
- Cardiac defibrillator, implantable A device put within the body that is designed to recognize certain types of abnormal heart rhythms…
- Euploid The normal number of chromosomes for a species. In humans, the euploid number of chromosomes is 46 with the…
- Atresia, biliary Congenital absence or closure of the major bile ducts, the ducts that drain bile from the liver. Biliary…
- Lewis Thomas See: Thomas, Lewis
- Hysterectomy, partial The uterus is surgically removed but the cervix is left is left in place. Also called a subtotal hysterectomy
- Focal dystonia due to blepharospasm The involuntary forcible closure of the eyelid due to spasms. The first symptoms may be uncontrollable…
- Syndrome, Rett See: Rett syndrome
- Daily Value The abnormal formation of the hip joint in which the ball at the top of the thighbone (the femoral head) is…