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).
Type I error
The statistical error (said to be 'of the first kind' or alpha error) made in testing an hypothesis when it is concluded that a treatment or intervention is effective when it really is not. Sometimes referred to as a false positive
Read the definitionRandom terms
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- Night blindness Impaired vision in dim light and in the dark, due to impaired function of specific vision cells (namely, the…
- Valsalva maneuver A maneuver in which a person tries to exhale forcibly with a closed glottis (the windpipe) so that no air…
- Transmission distortion Distortion in the transmission of genes or chromosomes to the offspring, resulting in a significant…
- Rhabdomyolysis A condition in which skeletal muscle cells break down, releasing myoglobin (the oxygen-carrying pigment in…
- Rett syndrome An X-linked dominant neurological disorder that affects girls only and is one of the most common causes of…
- Aneurysm, dissecting An aneurysm is a localized widening (dilatation) of an artery, vein, or the heart. At the area of an…
- Rocky Mountain wood tick A tick that can transmit R. rickettsii, the agent of Rocky Mountain spotted fever. This tick is found in the…
- Dacryoadenitis Inflammation of a lacrimal gland (a gland that produces tears)
- Blood transfusion Ding=0 width='100%' border=0> ODYvAlign=top bgColor=#cccccc colSpan=2> vAlign=top width='100%'…
- Phacoemulsification A procedure in which the lens clouded by a cataract is broken up by ultrasound, irrigated, and suctioned out…
- Hysterectomy, laparoscopically assisted vaginal Rocedure using laparoscopic techniques to remove the uterus (womb) and/or tubes and ovaries through the…