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pylorus

[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).
Anatomy
1.
the opening between the stomach and the duodenum.
Origin
1605-1615
1605-15; < Late Latin < Greek pylōrós literally, gatekeeper
Related forms
pyloric
[pahy-lawr-ik, -lor-, pi-] /paɪˈlɔr ɪk, -ˈlɒr-, pɪ-/ (Show IPA),
adjective
postpyloric, adjective
prepyloric, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for pylorus
  • His pylorus often spasms which causes this vomiting.
  • The small intestine is a convoluted tube, extending from the pylorus to the colic valve, where it ends in the large intestine.
  • It is thin at the cardiac extremity, but thicker toward the pylorus.
British Dictionary definitions for pylorus

pylorus

/paɪˈlɔːrəs/
noun (pl) -ri (-raɪ)
1.
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
n.

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
pylorus
  (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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Encyclopedia Article for 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 passage of large food particles or undigested material into the intestine.

Learn more about pylorus with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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