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).
Syncope, heat
Sudden dizziness or fainting experienced after exercising in the heat. The skin appears pale and sweaty but is generally moist and cool. The pulse may be weakened, and the heart rate is usually rapid. Body temperature is normal
Read the definitionRandom terms
Show more- HCFA The Health Care Finance Administration, the part of the U.S. Department of Health and Human Services (HHS)…
- Alpha-defensin See: Defensin
- CABG Coronary artery bypass graft; and Coronary artery bypass grafting
- Congenital vaccinia Infection of the fetus in the last trimester of pregnancy due to bloodborne dissemination of the vaccinia…
- Fat 1 Along with proteins and carbohydrates, one of the three nutrients used as energy sources by the body. The…
- Ortholog A gene in two or more species that has evolved from a common ancestor. Also called an orthologous gene
- Afferent Carrying toward. A vein is an afferent vessel since it carries blood toward from the heart. An afferent nerve…
- Asthenic 1. Weak. Lacking in strength. 2. Having a slender light body. Ectomorphic.See also: Lambert-Eaton myasthenic…
- PX Medical abbreviation for prognosis
- Cyto- Colorblindness of the red-green type (also known as deuteranopia or deuteranomaly). The term "Daltonism" is…
- Fever, cat scratch A bacterial infection due to a cat scratch seen most often today in people with HIV. The disease…
- Vitamin B3 Vitamin B3 is niacin. Deficiency of niacin causes pellagra. Pellagra was known as the 'disease of the four…