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).
Arrhythmias, atrial
Abnormal heart rhythm due to electrical disturbances in the atria (the upper chambers of the heart) or the AV node 'relay station', leading to fast heart beats. Examples of atrial arrhythmias includes atrial fibrillation, atrial flutter…
Read the definitionRandom terms
Show more- Niacin deficiency See: Pellagra
- Dander Tiny scales shed from human or animal skin or hair. Dander floats in the air, settles on surfaces and makes…
- Pitting edema Observable swelling of body tissues due to fluid accumulation that may be demonstrated by applying pressure…
- Sweat gland The sweat (sudoriferous) glands are small tubular structures situated within and under the skin (in the…
- Hex-A deficiency See: Tay-Sachs disease
- Syndrome, Gower (situational syncope) The temporary loss of consciousness in particular kinds of situations. (Syncope is temporary loss of…
- Aphonia Inability to speak.
- Roentgen ray Term coined around 1890 that preceded X-ray and is now synonymous with it. Named for Wilhelm Roentgen, a…
- Air-conditioner lung A form of the sick building syndrome caused by organisms that contaminate humidifiers and the piping of air…
- Brown, Louise The world's first test-tube baby, conceived by in vitro fertilization and born on July 25, 1978
- RUQ Abbreviation for the right upper quadrant (quarter). The RUQ of the abdomen contains the liver and the…
- Goldenhar syndrome Congenital malformation of the jaw, cheek and ear associated with vertebral defects. There is deformity of…