omasum

[oh-mey-suhm]
noun, plural omasa [oh-mey-suh] .
the third stomach of a ruminant, between the reticulum and the abomasum; the manyplies.

Origin:
1700–10; < Neo-Latin, Latin omāsum bullock's tripe

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World English Dictionary
omasum (əʊˈmeɪsəm)
 
n , pl -sa
another name for psalterium
 
[C18: from Latin: bullock's tripe]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
omasum   (ō-mā'səm)  Pronunciation Key 
Plural omasa
The third division of the stomach in ruminant animals. It removes excess water from food and further reduces the size of food particles before passing them to the abomasum for digestion by enzymes. See more at ruminant.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The omasum functions as a pump and directs the partially digested food from the reticulum to the abomasum.
The omasum functions as a pump and sends the partially digested food from the reticulum to the abomasum.
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