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).
Lens, objective
In a microscope, the objective lens is the lens nearest to the object being examined whereas the lens closest to the eye is termed the ocular (the eyepiece). The light microscope today is usually binocular (with one ocular for each eye)…
Read the definitionRandom terms
Show more- Attenuated Weakened, diluted, thinned, reduced, weakened, diminished. The use of 'attenuated' in medicine is not new. In…
- Methionine An amino acid, one of the 20 building blocks of protein. A dietary essential amino acid, methionine provides…
- Danders See: Dander
- Venule A little vein. Venules go from capillaries to veins, vessels that carry blood low in oxygen content from the…
- AAAS Spoken of as the 'triple-AS', the American Association for the Advancement of Science is an organization…
- Enzymes Proteins that act as a catalysts in mediating and speeding a specific chemical reaction. In 1902 Archibald…
- Crossing over The exchange of genetic material between two paired chromosomes. Crossing over is a way to recombine the…
- Wheal A raised, itchy (pruritic) area of skin that is almost always an overt sign of allergy. Not all wheals are…
- Sclerosis, multiple The injection of a chemical irritant into a vein to sclerose ("harden") it. The chemical irritates the lining…
- Raccoon roundworm infection Infection by the raccoon roundworm is also called Baylisascaris. The species commonly found in raccoonsis…
- Perineum The area between the anus and the scrotum in the male and between the anus and the vulva (the labial opening…
- Papillary tumor A tumor shaped like a small mushroom with its stem attached to the inner lining of the bladder