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).
Annulus
A ringlike structure, or any body part that is shaped like a ring. Applied to many small ring-shaped structures. The base of a heart valve that supports the valve's leaflets is called the annulus. A ring-shaped pancreas that encircles the…
Read the definitionRandom terms
Show more- Prepuce The fold of skin that covers the head of the penis. Also known as the foreskin. Only about 1 in every 20 boys…
- Primary First or foremost in time or development. The primary teeth (the baby teeth) are those that come first…
- Exstrophy Eversion of a hollow organ at birth. An exstrophic bladder is one that is turned inside out like a rubber…
- Respiratory distress syndrome, acute Better known as ARDS. See: ARDS
- Corpse A dead body. The term corpse is more often used in in mystery stories than in medicine which, for obscure…
- Pulmonary embolus A blood clot that has passed into and occluded the lung's pulmonary artery. An embolus causes an embolism. In…
- Cohort In a clinical study, a well-defined group of subjects or patients who have had a common experience or…
- Mask of pregnancy Muddy-brown pigmentation on the cheeks or elsewhere on the face that develops in about half of all women…
- Anatomical snuffbox A hollow seen on the radial aspect (the thumbside) of the dorsum (the back) of the wrist when the thumb is…
- Algia Word ending indicating pain, as in arthralgia (joint pain), cephalgia (headache), fibromyalgia, mastalgia…
- Oral cholecystogram Oral cholecystogram: Abbreviated OCG. An x-ray procedure for diagnosing gallstones. The patient takes…
- Big toe sign An important neurologic examination based upon what the big toe (and other toes) do when the sole of the foot…