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:
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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).
Fraternal twin
Twin: A twin who have shared a common uterine environment with its sibling. Fraternal twins are due to the fertilization of two different ova by different sperm. Fraternal twins are also called dizygotic twins.
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Show more- Disruption sequence The events that occur when a fetus that is developing normally is subjected to a destructive agent such as…
- Vomiting in pregnancy, excess Medically known as hyperemesis gravidarum, this is excessive vomiting in early pregnancy. By definition…
- Stem cell One of the human body's master cells, with the ability to grow into any one of the body's more than 200 cell…
- Spondylolysis The breaking down (dissolution) of a portion of a bony building block of the spine (a vertebra). The portion…
- Fever blister A small sore situated on the face or in the mouth that causes pain, burning, or itching before bursting and…
- Hypotonia Decreased tone of skeletal muscles. In a word, floppiness. Hypotonia is a common finding in cerebral palsy…
- Syndrome, third and fourth pharyngeal pouch See: DiGeorge syndrome
- Locomotive system Limited to a local region. See also: Locoregional anesthesia; Locoregional metastasis.
- Polyglandular autoimmune syndrome (PGA) A genetic autoimmune disease with an extraordinary array of clinical features but characterized most often by…
- Arch, vertebral See: Vertebral arch
- Reflex, Babinski An important neurologic test based, believe it or not, upon what the big toe does when the sole of the foot…
- Calculus, renal A stone in the kidney (or lower down in the urinary tract). Also called a kidney stone. The stones themselves…