py·​lo·​rus pī-ˈlȯr-əs How to pronounce pylorus (audio)
plural pylori pī-ˈlȯr-ˌī How to pronounce pylorus (audio)
: the muscular opening from the vertebrate stomach into the intestine

Examples of pylorus in a Sentence

Recent Examples on the Web The closer a pill lands to the antrum, the last part of the stomach before the intestine, the faster the pill begins to dissolve and find its way through the pylorus into the duodenum, the first part of the small intestine. Scott Lafee, San Diego Union-Tribune, 20 Sep. 2022 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, 4 Dec. 2019

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'pylorus.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


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

First Known Use

1565, in the meaning defined above

Time Traveler
The first known use of pylorus was in 1565

Dictionary Entries Near pylorus

Cite this Entry

“Pylorus.” Dictionary, Merriam-Webster, Accessed 24 Apr. 2024.

Kids Definition


py·​lo·​rus pī-ˈlōr-əs How to pronounce pylorus (audio)
plural pylori -ˈlō(ə)r-ˌī How to pronounce pylorus (audio)
: the opening in a vertebrate animal from the stomach into the intestine

Medical Definition


py·​lo·​rus pī-ˈlōr-əs, pə-ˈlȯr- How to pronounce pylorus (audio)
: the opening from the vertebrate stomach into the intestine see pyloric sphincter

More from Merriam-Webster on pylorus

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