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).
Graft-versus-host disease
A complication of bone marrow transplants in which T cells in the donor bone marrow graft go on the offensive and attack the host's tissues. Graft-versus-host disease (GVHD) is seen most often in cases where the blood marrow donor is…
Read the definitionRandom terms
Show more- R/O Medical abbreviation for rule out
- Zona pellucida The strong membrane that forms around an ovum as it develops in the ovary. The membrane remains in place…
- Forced expiratory volume The volume of air that can be forced out taking a deep breath, an important measure of pulmonary function…
- Dacryocyst The lacrimal sac; tear sac. The dilated (widened) upper end of the nasolacrimal duct, the passageway that…
- Antifungal drug A drug used to treat fungal infections. Examples of antifungal drugs include miconazole (MONISTAT) and…
- Alpha-fetoprotein (AFP) AFP is a plasma protein that is normally produced by the fetus. It serves as the basis for some useful tests…
- Pectus excavatum Caved-in or funnel chest. The Latin 'pectus' means 'chest.' The chest is excavated. It looks as if it has…
- Pilonidal Refers to an embedded (ingrown) hair or tuft of hair. Literally, a nest of hair. From the Latin pilus…
- Nerve, pressor A pressor nerve is a nerve which, when stimulated, causes the blood pressure to rise. The word 'pressor'…
- Ostomy An operation to create an opening from an area inside the body to the outside
- Embolus Something that travels through the bloodstream, lodges in a blood vessel and blocks it. Examples of emboli…
- Calefacient 1. (noun) Anything that warms. 2. (noun) A substance that produces a feeling of warmth when it is applied to…