Anatomy
pylorus Audio
py·lo·rus [ pahy-lawr-uh s, -lohr-, pi- ]
Subclass of:
Stomach
Etymology:
Greek pyloros = gatekeeper; from pyle = gate + ouros = a guard
The muscular ring of the pylorus guards the outlet of the stomach.
Definitions related to pylorus:
  • (stomach, pylorus) The region of the stomach that connects to the duodenum.
    CDISC Terminology
    Clinical Data Interchange Standards Consortium (CDISC), 2021
  • The lower part of the stomach that connects to the duodenum.
    NCI
    U.S. National Cancer Institute, 2021
  • The region of the STOMACH at the junction with the DUODENUM. It is marked by the thickening of circular muscle layers forming the pyloric sphincter to control the opening and closure of the lumen.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • Pylorus, cone-shaped constriction in the gastrointestinal tract that demarcates the end of the stomach and the beginning of the small intestine. The main functions of the pylorus are to prevent intestinal contents from reentering the stomach when the small intestine contracts and to limit the...
    Encyclopedia Britannica
    Encyclopedia Britannica, Inc., 2025
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