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[ab-uh-mey-suh m] /ˌæb əˈmeɪ səm/
noun, plural abomasa
[ab-uh-mey-suh] /ˌæb əˈmeɪ sə/ (Show IPA)
the fourth or true stomach of cud-chewing animals, lying next to the omasum.
Origin of abomasum
From New Latin, dating back to 1700-10; See origin at ab-, omasum Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for abomasum


the fourth and last compartment of the stomach of ruminants, which receives and digests food from the psalterium and passes it on to the small intestine
Word Origin
C18: New Latin, from ab-1 + omāsum bullock's tripe
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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abomasum in Science
Plural abomasa
The fourth division of the stomach in ruminant animals, and the only one having glands that secrete acids and enzymes for digestion. It corresponds anatomically to the stomachs of other mammals. See more at ruminant.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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