py·​lo·​rus | \ pī-ˈlȯr-əs How to pronounce pylorus (audio) , pə- \
plural pylori\ pī-​ˈlȯr-​ˌī How to pronounce pylori (audio) , -​(ˌ)ē , pə-​ \

Definition of pylorus

: the muscular opening from the vertebrate stomach into the intestine

Examples of pylorus in a Sentence

Recent Examples on the Web This is key, because once popped back open, those arms span wider than two centimeters—the diameter of the human pylorus, the gateway to the intestines. Wired, "A Once-a-Month Birth Control Pill Is Coming—Here's How It Works," 4 Dec. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pylorus.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of pylorus

1565, in the meaning defined above

History and Etymology for pylorus

Late Latin, from Greek pylōros, literally, gatekeeper, from pylē

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Time Traveler for pylorus

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The first known use of pylorus was in 1565

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Cite this Entry

“Pylorus.” Dictionary, Merriam-Webster, Accessed 28 Feb. 2020.

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More Definitions for pylorus


py·​lo·​rus | \ pī-ˈlōr-əs, pə-ˈlȯr- How to pronounce pylorus (audio) \
plural pylori\ -​ˈlō(ə)r-​ˌī, -​(ˌ)ē How to pronounce pylori (audio) \

Medical Definition of pylorus

: the opening from the vertebrate stomach into the intestine — see pyloric sphincter

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