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).
REM sleep
Sleep: REM sleep is the portion of sleep when there are rapid eye movements (REMs). Dreams occur during REM sleep. We typically have 3 to 5 periods of REM sleep per night. They occur at intervals of 1-2 hours and are quite variable in…
Read the definitionRandom terms
Show more- Poison Any substance that can cause severe distress or death if ingested, breathed in, or absorbed through the skin…
- Red-green colorblindness A form of colorblindness in which red and green are perceived as identical. This is the most common type of…
- Dysostosis, cleidocranial >Absent or incompletely formed collar bones (the 'cleido-' part refers to the clavicles, the collar bones)…
- Oncologist A physician who specializes in the diagnosis and treatment of cancer. A clinical oncologist is usually…
- Normal tension glaucoma See: Glaucoma, normal tension
- Menstrually associated migraine See: Menstrual migraine
- James Ramsay Hunt See: Ramsay Hunt, James
- Carcinoma, pancreatic See: Pancreatic cancer
- Psoralen photochemotherapy See: PUVA
- Brill-Zinsser disease Recrudescence of epidemic typhus years after the initial attack. The agent that causes epidemic typhus…
- Anaerobic Not requiring oxygen. Anaerobic bacteria do not need oxygen to grow; in fact, oxygen is usually toxic to…
- Rotavirus Rotavirus (RV): A leading cause of severe winter diarrhea in young children, RV each year causes an estimated…