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).
Lhermitte sign
Sudden transient electric-like shocks extending down the spine triggered by flexing the head forward. Due to a disorder such as compression of the cervical spine (the portion of the spinal cord within the neck). One patient who experienced…
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Show more- Fever, jail See: Typhus, epidemic
- Enzymes Proteins that act as a catalysts in mediating and speeding a specific chemical reaction. In 1902 Archibald…
- Cell, rod A type of specialized light-sensitive cell (photoreceptor) in the retina of the eye that provides side vision…
- Pauling See: Pauling, Linus
- Pulmonary insufficiency 1. Incomplete closure of the pulmonary valve in the heart, allowing blood to return from the pulmonary artery…
- Thallium Thallium: A metallic element having the symbol Tl and the atomic number 81 and an atomic weight of about 204…
- Phospholipase An enzyme that catalyzes the splitting of a phospholipid molecule by the addition of water. Also called a…
- Y-linkage The presence of a gene on the Y chromosome. Y-linkage is analogous to X-linkage (the presence of a gene on…
- Thoracic aorta The thoracic aorta is a section of the aorta, the largest artery in the body, within the chest. Specifically…
- Pericentric chromosome inversion A basic type of chromosome rearrangement in which a segment that includes the centromere (and so is…
- USPHS (United States Public Health Service) The agency responsible for the public health of the American people. The Public Health Service (PHS)…
- Jail fever See: Typhus, epidemic