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).
Long QT syndrome
An inherited defect in heart rhythm that predisposes to syncope without warning (sudden fainting spells), dizziness, palpitations, seizures and sudden death. The name of the syndrome comes from the QT segment in the tracing on the…
Read the definitionRandom terms
Show more- Sequence, conserved A base sequence in a DNA molecule (or an amino acid sequence in a protein) that has remained essentially…
- SDF-1 An intensely itchy rash due to contact with the tiny thimble jellyfish (Linuche unguiculata). These jellyfish…
- Transmission distortion Distortion in the transmission of genes or chromosomes to the offspring, resulting in a significant…
- Photocoagulation The coagulation (clotting) of tissue using a laser which produces light in the visible green wavelength that…
- Policy, Medigap See: Medigap policy>
- Acetic acid The acid most commonly associated with vinegar. Acetic acid is a two-carbon carboxylic acid. Its formula is…
- Macrovascular disease Disease of the large blood vessels, including the coronary arteries, the aorta, and the sizable arteries in…
- HSA 1. In the US, Health Saving Account.2. Human serum albumin
- NIAID (Nat'l Inst of Allergy and Infectious Dis.) Seases: One of the U.S. National Institutes of Health (NIH), the mission of the NIAID is 'to support and…
- Musical hallucination A form of auditory hallucination in which music is heard, often the same piece of music. In most cases the…
- Cretinism Congenital hypothyroidism (underactivity of the thyroid gland at birth) resulting in growth retardation…
- Hormone,T4 Thyroxine