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).
Headache, thunderclap
A sudden and excruciatingly painful headache. Some doctors feel that in the absence of a known headache disorder, such as migraines, a thunderclap headache may sometimes signal a ruptured aneurysm in the brain. See your physician…
Read the definitionRandom terms
Show more- Kinky hair syndrome See: Menkes syndrome
- ETS Environmental tobacco smoke. Smoke generated from the sidestream (the burning end) of a cigarette, pipe or…
- Therapy The treatment of disease. Therapy is synonymous with treatment, as for example: > >Antiretroviral therapy…
- ZIP code, protein An informal name for a molecular cell biology system of signals or 'address tags' that guide the movement of…
- Stoma An opening into the body from the outside created by a surgeon
- Thimerosal A mercury-containing preservative used in some vaccines and other products since the 1930's. No harmful…
- Obtunded Mentally dulled. A person may be obtunded due to head trauma. To obtund is to dull or blunt. From the Latin…
- Fear of ghosts An abnormal and persistent fear of ghosts. Sufferers of this fear experience undue anxiety even though they…
- Narcan Brand name for naloxone
- Phenylketonuria, maternal See Maternal phenylketonuria
- Meconium ileus Obstruction of the intestine (ileus) due to overly thick meconium, the dark sticky stuff that is normally…
- Sphingomyelin lipoidosis Also called Niemann-Pick disease, this is a disorder of the metabolism of a lipid (fat) called sphingomyelin…