from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The fourth division of the stomach in ruminant animals, such as cows, sheep, and deer, in which digestion takes place.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The fourth or digestive stomach of a ruminant, which leads from the third stomach, the omasum.
from the GNU version of the Collaborative International Dictionary of English
- n. The fourth or digestive stomach of a ruminant, which leads from the third stomach omasum. See ruminantia.
from The Century Dictionary and Cyclopedia
- n. The fourth or true stomach of ruminating animals, lying next to the omasum or third stomach, and opening through the pylorus into the duodenum. See cut under ruminant.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the fourth compartment of the stomach of a ruminant; the one where digestion takes place
New Latin, from Latin ab ("away from") + omāsum ("tripe of a bullock") (Wiktionary)