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).
EM (electron microscope)
A microscope in which an electron beam replaces light to form the image. EM stands for electron microscope (the device) and for electron microscopy (the technique and field). EM has its pluses (greater magnification and resolution than…
Read the definitionRandom terms
Show more- Flat feet A condition of the feet in which the arch of the instep is flattened and the entire sole touches the ground…
- Cancer, stomach Cancer of the stomach, the main organ that holds food for digestion. Worldwide, stomach cancer is the second…
- Fibulin 5 A protein that belongs to a family of extracellular proteins expressed in the basement membranes of blood…
- Atresia, aortic Congenital absence of the normal valvular opening from the left ventricle of the heart into the aorta…
- Diverticulitis, bleeding from Diverticular bleeding typically occurs intermittently over several days. Colonoscopy is usually performed to…
- Capitation In U.S. health services, capitation refers to a fixed 'per capita' amount that is paid to a hospital, clinic…
- Abdominal aneurysm An aneurysm situated within the abdomen (belly). An aneurysm is a localized widening (dilatation) of an…
- Agita Heartburn, acid indigestion, an upset stomach or, by extension, a general feeling of upset. The word is…
- Impetigo Impetigo: A bacterial skin infection caused by the staphylococcus or, more rarely,streptococcus bacteria. The…
- Jackson, John Hughlings See: Hughlings Jackson, John
- Coccidioidomycosis (CM) A disease due to a fungus called Coccidioides immitis. About 40% of people infected with this fungus develop…
- Protozoa A single-cell organism that can only divide within a host organism. Malaria is caused by a protozoa…