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).
Hair, exclamation point
Exclamation point hair is a key diagnostic finding in a disorder called alopecia areata. Alopecia areata is patchy baldness (alopecia means baldness and areata means occurring in patches) which typically begins with patchy hair loss on the…
Read the definitionRandom terms
Show more- Roentgen ray Term coined around 1890 that preceded X-ray and is now synonymous with it. Named for Wilhelm Roentgen, a…
- Shock, anaphylactic A life-threatening allergic reaction characterized by a swelling of body tissues including the throat…
- Encopresis Encopresis: Inability to control the elimination of stool (fecal incontinence). Encopresis can have a variety…
- Photocoagulation The coagulation (clotting) of tissue using a laser which produces light in the visible green wavelength that…
- Vascular hemophilia See: Von Willebrand disease
- Cervical rib >True ribs: The first seven ribs attach to the sternum (the breast bone) in the front and are known as true…
- Mycotoxin A toxin produced by a fungus. A mycotoxin may be formed when grains or some other products become moldy. From…
- Adamantine In dentistry, relating to the enamel of the teeth. Adamantine comes from the Greek and Latin word adamas…
- Otoacoustic emission test A physician specialized in diagnosing and treating diseases of the head and neck, especially those involving…
- Over-the-counter (OTC) drug A drug for which a prescription is not needed
- Scale, skin A thin piece of the outermost layer of skin resembling a fish scale. They represent a heaping up of the…
- Level 1 biosafety >Level 1 -- This level applies to agents that do not ordinarily cause human disease. >Level 2 -- This level…