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).
Arrhythmia, sinus
The normal increase in heart rate that occurs during inspiration (when you breathe in). This is a natural response and is more accentuated in children than adults. The 'sinus' refers to the natural pacemaker of the heart which is called…
Read the definitionRandom terms
Show more- Urge incontinence A sudden involuntary contraction of the muscular wall of the bladder causing urinary urgency, an immediate…
- Conor and Bruch disease African tick typhus, one of the tick-borne rickettsial diseases of the eastern hemisphere similar to Rocky…
- Joint hypermobility syndrome A common benign childhood condition involving hypermobile joints (that can move beyond the normal range of…
- Granulomatosis, Wegener's An inflammatory disease of small arteries and veins (vasculitis) that classically involves vessels supplying…
- Additive genetic effects A mechanism of quantitative inheritance such that the combined effects of genetic alleles at two or more gene…
- Cholangi- Relating to a bile duct. From the Greek chole meaning bile + a(n)geion meaning a vessel = a bile vessel
- Suicide gene A gene whose expression in a cell is lethal for that cell. Suicide genes form the basis of a strategy for…
- Alopecia capitis totalis Loss of all of the scalp hair. Alopecia means baldness and capitis refers to the head. Alopecia capitis…
- Pneumonitis, radiation Inflammation of the lungs as a result of radiation. Although the radiation can be from various sources…
- Genetics, transplantation The field of biology and medicine relating to the genes that govern the acceptance or rejection of a…
- Nails, white spots on the Very small semi-circular white spots on the nails. These spots may be found on the fingernails and…
- Fibrillin 1 See: FBN1