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Definition of pylorus - 5 dictionary results

py⋅lo⋅rus

[pahy-lawr-uhs, -lohr-, pi-]
–noun, plural -lo⋅ri [-lawr-ahy, -lohr-ahy] . Anatomy.
the opening between the stomach and the duodenum.


Origin:
1605–15; < LL < Gk pylōrós lit., gatekeeper


py⋅lor⋅ic [pahy-lawr-ik, -lor-, pi-] , adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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py·lo·rus   (pī-lôr'əs, -lōr'-, pĭ-)   
n.   pl. py·lo·ri (-lôr'ī', -lōr'ī')
The passage at the lower end of the stomach that opens into the duodenum.

[Late Latin pylōrus, from Greek pulōros : pulē, gate + ouros, guard; see wer-3 in Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: py·lo·rus
Pronunciation: pI-'lOr-&s, p&-'lor-
Function: noun
Inflected Form: plural py·lo·ri /-'lO(&)r-"I, -(")E/
: the opening from the vertebrate stomach into the intestine —see PYLORICSPHINCTER
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

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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Encyclopedia

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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