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.
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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).
Test, visual acuity
This test measures how well you see at various distances. It is the familiar eye chart test. The eye chart itself -- the usual one is called Snellen's chart -- is imprinted with block letters that line-by-line decrease in size…
Read the definitionRandom terms
Show more- Phantom vision Seeing images after total loss of eyesight
- Nasal mucus A slippery fluid produced by the membranes lining the nose. Excessive nasal mucus is the basis of a runny…
- Seborrheic dermatitis A medical name for what is popularly called seborrhea
- Mean cell hemoglobin Hemoglobin: The average amount of hemoglobin in the average red cell. The mean cell hemoglobin (MCH) is a…
- Muscular dystrophy One of a group of genetic diseases characterized by progressive weakness and degeneration of the skeletal or…
- Dowager's hump An abnormal outward curvature of the vertebrae of upper back. Compression of the front (anterior) portion of…
- Atrophic vaginitis Thinning of the lining (the endothelium) of the vagina due to decreased production of estrogen. This may…
- Mycobacteria Plural of mycobacterium
- Tympany A hollow drum-like sound produced when a gas-containing cavity is tapped sharply. Tympany is heard if the…
- Chemical reaction A process in which one substance is transformed into another. Thousands of different types of chemical…
- Myeloproliferative disorders Malignant diseases of certain bone marrow cells including those that give rise to the red blood cells, the…
- In-the-canal hearing aid A hearing instrument custom designed to fit in the ear canal. It protrudes slightly into the outer ear and so…