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).
Prior authorization
In pharmacy, a cost-containment procedure that requires a prescriber to obtain permission to prescibe a medication prior to prescribing it. Also called prior approval
Read the definitionRandom terms
Show more- Nevoid basal cell carcinoma syndrome The Gorlin syndrome
- Hyperplasia of the prostate, nodular See: Benign prostatic hyperplasia
- History, social An account of a patient that puts his illness or behavior in context. It may include aspects of the patient's…
- XXXXX syndrome A chromosome disorder in females, caused by the presence of five X chromosomes rather than the usual two. It…
- Acute angle-closure glaucoma Increased pressure in the front chamber (anterior chamber) of the eye due to sudden (acute) blockage of the…
- Toxin, anthrax The toxic substance secreted by the bacterium Bacillus anthracis, the causative agent of the disease anthrax…
- Tube, endotracheal A flexible plastic tube that is put in the mouth and then inserted down into the trachea (the airway). The…
- Group A strep A well-known strain (a type) of streptococcus (strep) bacteria that can cause strep throat and common skin…
- Seminal vesicle A structure in the male that is about 5 centimeters (2 inches) long and is located behind the bladder and…
- Alactasia Lack of the enzyme lactase which is needed to digest the milk sugar lactose. See: Lactase deficiency
- Cyst, ovarian A fluid-filled sac in the ovary. The most common type of ovarian cyst is called a follicular cyst. It results…
- Acute fatty liver of pregnancy Fatty liver of pregnancy: Liver failure in late pregnancy, usually from unknown cause. Acute fatty liver of…