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).
Visual acuity test
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…
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Show more- Osteolytic lesion A 'punched-out' area of severe bone loss. Osteolytic lesions are seen in metastatic lung and breast cancer…
- Metapneumovirus, human See: Human metapneumovirus
- Encephalitis, flavivirus See: Flavivirus encephalitis
- Lymphangitis The red streaking and gland (lymph node) swelling in the area of an injury especially on the extremities. It…
- Syndrome, chromosome 4 short-arm deletion This syndrome, called the Wolf-Hirschhorn syndrome, is a chromosome disorder due to partial deletion of the…
- Extravasate To exude from or pass through the walls of a vessel into the surrounding tissues. Blood, lymph, or urine can…
- Nephrotomogram A series of special x-rays of the kidneys. The x-rays are taken from different angles. They show the kidneys…
- Lactose The sugar found in milk. The body uses the enzyme lactase to break down lactose into galactose and glucose
- Pagetic Pertaining to Paget disease, a chronic disorder that typically results in enlarged, deformed bones due to…
- Neural foramen See: Intervertebral foramen
- Ascites Abnormal buildup of fluid in the abdomen. Ascites can occur as a result of a number of conditions, including…
- Psoriasis Psoriasis: A reddish, scaly rash often located over the surfaces of the elbows, knees, scalp, and around or…