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).
Retinoblastoma
Retinoblastoma: A malignant eye tumor in children, usually under age 5, that arises in cells in the developing retina containing cancer-predisposing mutations in both copies of the gene RB1. The most common sign of retinoblastoma (RB) is a…
Read the definitionRandom terms
Show more- Saccade Abrupt rapid small movements of both eyes, such as when the eyes scan a line of print. The saccades can be…
- Rest 1. Repose. Relaxation.2. A fragment of embryonic tissue that has been retained after the period of embryonic…
- Disease, chronic obstructive pulmonary (COPD) Any disorder that persistently obstructs bronchial airflow. COPD mainly involves two related diseases --…
- Small cell lung cancer A type of lung cancer in which the cells appear small and round under the microscope. Also called oat cell…
- Retinoid Retinol is vitamin A. Carotene compounds (found, for example, in egg yolk, butter and cream) are gradually…
- Perianal Located around the anus, the opening of the rectum to the outside of the body. Peri- is a prefix borrowed…
- Ampulla In anatomy, a sac-like enlargement of a canal or duct. The ampulla of Vater is the enlargement of the ducts…
- Cachexia Physical wasting with loss of weight and muscle mass caused by disease. Patients with advanced cancer, AIDS…
- Jaundice, hemolytic Jaundice, hemolytic: Jaundice caused by destruction of red blood cells. This can be an inborn condition…
- Calcium A mineral found mainly in the hard part of bones, where it is stored. Calcium is added to bones by cells…
- Shoulder, frozen See: Frozen shoulder
- T-suppressor cells T cells that express the CD8 transmembrane glycoprotein (CD8+ T cells). They close down the immune response…