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).
Encephalopathy, mitochondrial (MELAS)
MELAS is the acronym for Mitochondrial Encephalopathy, Lactic Acidosis, and Strokelike episodes. MELAS is a form of dementia. It is caused by mutations in the genetic material (DNA) in the mitochondria. While most of our DNA is in the…
Read the definitionRandom terms
Show more- Gingivitis, phagedenic This is trench mouth, a progressive painful infection with ulceration, swelling and sloughing off of dead…
- Recessive, X-linked A gene on the X chromosome that expresses itself only when there is no different gene present at that locus…
- Gallbladder A pear-shaped organ just below the liver that stores the bile secreted by the liver. During a fatty meal, the…
- Borborygmus Bowel sounds, the gurgling, rumbling, or growling noise from the abdomen caused by the muscular contractions…
- EXIT Stands for ex utero intrapartum treatment. Surgery on the fetus may be done after a Cesarean section, but…
- Submaxillary gland See Submandibular gland.
- Toxo (toxoplasmosis) Toxo (toxoplasmosis): An infection caused by a single-celled parasite named Toxoplasma gondii that may invade…
- Biopsy, skin See: Skin biopsy
- Toxin, anthrax The toxic substance secreted by the bacterium Bacillus anthracis, the causative agent of the disease anthrax…
- Axelrod, Julius (1912- ) American pharmacologist and neuroscientist who shared the 1970 Nobel Prize in Physiology or Medicine…
- Injury, knee meniscus Injury to one of the two crescent-shaped cartilage pads between the two joints formed by the femur (the thigh…
- Hyperexplexia A genetic disorder in which babies have an exaggerated startle reflex (reaction). This disorder was not…