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.
- 100% free
- No registration
- No intrusive ads
- Privacy by design
- Mobile friendly
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- Myostatin A growth factor that regulates the size of muscles beginning in early embryonic development and continuing…
- Pap test A screening test for cervical cancer based on the examination under the microscope of cells collected from…
- Alkalosis A dangerous decrease in the normal acidity of the blood. There is too much base in the blood and body. This…
- Senility 1. Originally, old age. 2. The physical decline associated with old age. 3. The mental decline once…
- Blister, water See: Water blister
- Disease, Refsum See Refsum disease
- Shoulder pain Pain in the shoulder due to an injury or disease. The design of the shoulder joint is such that it sacrifices…
- Transcription factor A protein that controls when genes are switched on or off -- whether genes are transcribed or not…
- Roentgen ray Term coined around 1890 that preceded X-ray and is now synonymous with it. Named for Wilhelm Roentgen, a…
- Fever, Rocky Mountain spotted (RMSF) Fever, Rocky Mountain spotted (RMSF): An acute febrile (feverish) disease initially recognized in the Rocky…
- Cancer Cancer: An abnormal growth of cells which tend to proliferate in an uncontrolled way and, in some cases, to…
- Punch biopsy A biopsy performed using a punch, an instrument for cutting and removing a disk of tissue. For example, a…