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).
Ejection fraction
The portion of blood that is pumped out of a filled ventricle as a result of a heartbeat. The heart does not eject all of the blood that is in the ventricle. Only about two-thirds of the blood is normally pumped out with each beat. That…
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Show more- Endovaginal ultrasound This type of imaging test is a special form of ultrasound developed to examine the pelvic organs and is the…
- Ophthalmology The art and science of eye medicine.
- Osteopenia Mild thinning of the bone mass, but not as severe as osteoporosis. Osteopenia results when the formation of…
- Alveolar hydatid disease >By directly ingesting food contaminated with stool from foxes or coyotes. This might include grass, herbs…
- Palate, cleft An opening in the roof of the mouth (the palate) due to a failure of the palatal shelves to come fully…
- Central vision Straight-ahead vision. Central vision is the work of the macula, a small area in the center of the retina…
- Isoflavone A type of plant estrogen (phytoestrogen) found chiefly in soybeans
- Deafness Deafness: Deafness is defined by partial or complete hearing loss. Levels of hearing impairment vary from a…
- Lymphoproliferative Referring to the proliferation of the bone marrow cells that give rise to lymphoid cells (such as lymphocytes…
- Radioallergosorbent test An allergy test done on a sample of blood. The test is used to check for allergic sensitivity to specific…
- Supine With the back or dorsal surface downward. A person who is supine is lying face up. As opposed to prone. For a…
- Major anomaly An unusual anatomic feature that is of serious medical or cosmetic consequence to the patient. For example, a…