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.
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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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L-
Abbreviation for levorotatory, applied to a chemical compound, as in l-dopa. Levorotary is opposed to dextrorotary which is abbreviated as d-. From the Latin laevus, on the left-hand side
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Show more- Lethal gene, zygotic A gene that is lethal (fatal) for the zygote, the cell formed by the union of a sperm (male sex cell) and an…
- Pachyderma Thick skin, like that of a pachyderm (an elephant, rhinoceros, or hippopotamus). From the Greek pachydermos…
- CpG In genetics, a site where cytosine (C) lies next to guanine (G) in the DNA sequence. (The p indicates that C…
- Tracheostomy button Tracheostomy button: A 1/2- to 1 1/2-inch-long plastic tube placed in the stoma to keep it open
- Trans fat An unhealthy substance, also known as trans fatty acid, made through the chemical process of hydrogenation of…
- Diverticulitis, treatment of acute Antibiotics are usually needed. Oral antibiotics are sufficient when symptoms are mild. Liquid or low fiber…
- Landry ascending paralysis A particularly virulent form of Guillain-Barre syndrome. The disorder often begins with a flu-like illness…
- IOP (intraocular pressure) The pressure created by the continual renewal of fluids within the eye. The normal IOP varies among…
- Abs Commonly used slang for the abdominal muscles, the muscles running up and down in the abdominal wall. The…
- Levo-alpha acetyl methadol Abbreviated LAAM. An alternative to methadone. See: LAAM
- Lymph node, sentinel The first lymph node ('gland') to receive lymphatic drainage from a tumor. Which lymph node is the sentinel…
- Neutral foot type The most common type of foot. A runner with a neutral type of foot lands on the heel and rolls forward during…