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).
Ring chromosome
A structurally abnormal chromosome in which the end of each chromosome arm has been lost and the broken arms have been reunited in ring formation. A ring chromosome is denoted by the symbol r
Read the definitionRandom terms
Show more- Bone, parietal The main bone on the side of the skull. Although the parietal bone is curved, it is considered a flat bone…
- False labor Intermittent non-productive muscular contractions of the womb (uterus) during pregnancy, most commonly in the…
- Thymus and parathyroids, hypoplasia of See: DiGeorge syndrome
- Dental and Craniofacial Research, National Inst. E of (NIDCR): One of the National Institutes of Health (NIH) in the U.S., the NIDCR is for dental and other…
- Immunization, DT DT (diphtheria and tetanus) vaccine does not protect from pertussis and is usually reserved for individuals…
- Disease, Niemann-Pick See: Niemann-Pick disease
- Pulseless disease Takayasu disease. Called pulseless disease because inflammation of blood vessels (vasculitis) can lead to…
- Crohn colitis Crohn disease involving only the large intestine (colon). Crohn disease is a chronic inflammatory disorder…
- Guarding, abdominal Involuntary tensing of the abdominal wall muscles to guard inflamed organs within the abdomen from the pain…
- Macrolide One in a class of antibiotics that includes Biaxin, Clarithromycin, Ery-Tab, and Erythromycin. The macrolides…
- Fear of going to bed An abnormal and persistent fear of going to bed. Sufferers of this fear experience anxiety even though they…
- Salvage chemotherapy Chemotherapy given after recurrence of a tumor. See: Salvage therapy