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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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).
Refraction
In ophthalmology, the bending of light that takes place within the human eye. Refractive errors include nearsightedness (myopia), farsightedness (hyperopia), and astigmatism. Lenses can be used to control the amount of refraction…
Read the definitionRandom terms
Show more- Ophthalmology The art and science of eye medicine.
- Right atrium The right upper chamber of the heart. The right atrium receives deoxygenated blood from the body through the…
- Reduviid bug A winged insect. Reduviids include kissing bugs which transmit Chagas disease. See: Chagas disease
- Test, EPO A test of the hormone EPO (erythropoietin) in blood. The EPO level can indicate bone marrow disorders, kidney…
- Plague bacterium genome All of the DNA (the genome) of the bacterium Yersinia pestis that causes the plague, consisting of four rings…
- Fantod A state of nervous anxiety or irritability. Also an irritable outburst. Pronounced fan-todd
- Registry Although a registry was originally the place (like Registry House in Edinburgh) where information was…
- STEP procedure See: Serial transverse enteroplasty
- Virus, human papilloma JC virus.
- Palate, cleft An opening in the roof of the mouth (the palate) due to a failure of the palatal shelves to come fully…
- Vaginal introitus The vaginal opening is called the introitus of the vagina. The Latin word 'introitus' comes from 'intro'…
- Islet cell carcinoma See: Islet cell cancer