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[pahy-lawr-uh s, -lohr-, pi-] /paɪˈlɔr əs, -ˈloʊr-, pɪ-/
noun, plural pylori
[pahy-lawr-ahy, -lohr-ahy, pi-] /paɪˈlɔr aɪ, -ˈloʊr aɪ, pɪ-/ (Show IPA).
the opening between the stomach and the duodenum.
Origin of pylorus
1605-15; < Late Latin < Greek pylōrós literally, gatekeeper
Related forms
[pahy-lawr-ik, -lor-, pi-] /paɪˈlɔr ɪk, -ˈlɒr-, pɪ-/ (Show IPA),
postpyloric, adjective
prepyloric, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for pylorus


noun (pl) -ri (-raɪ)
the small circular opening at the base of the stomach through which partially digested food (chyme) passes to the duodenum
Derived Forms
pyloric, adjective
Word Origin
C17: via Late Latin from Greek pulōrus gatekeeper, from pulē gate +ouros guardian
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for pylorus

1610s, from Late Latin pylorus "the lower orifice of the stomach," from Greek pyloros, literally "gatekeeper, porter," from pyle "gate" (see pylon) + ouros "watcher, guardian" (see warrant (n.)). Related: Pyloric.

Online Etymology Dictionary, © 2010 Douglas Harper
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pylorus in Medicine

pylorus py·lo·rus (pī-lôr'əs)
n. pl. py·lo·ri (-lôr'ī')

  1. The passage at the lower end of the stomach that opens into the duodenum.

  2. A muscular or myovascular structure that opens or closes an orifice or lumen of an organ.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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pylorus in Science
  (pī-lôr'əs, pĭ-)   
Plural pylori (pī-lôr'ī', pĭ-)
The passage at the lower end of the stomach that opens into the small intestine.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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