Definition of pylorus in English:

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Pronunciation: /pīˈlôrəs/

noun (plural pylori /-ˈlôrˌī/ /-ˈlôrē/)

The opening from the stomach into the duodenum (small intestine).
Example sentences
  • A septum of connective tissue separates the circular muscle layers of the pylorus and duodenum.
  • A clear catheter entered the stomach at the gastrostomy site and had passed the pylorus into the duodenum.
  • If it is exactly in the midline, it may be the duodenal bulb, the pylorus, or the distal antrum.


Early 17th century: via late Latin from Greek pulouros 'gatekeeper', from pulē 'gate' + ouros 'warder'.

For editors and proofreaders

Syllabification: py·lo·rus

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