n. The fourth or digestive stomach of a ruminant, which leads from the third stomach, the omasum.
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.
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.
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
Word Usage
"The fourth compartment, known as the abomasum, is the deer's "true" stomach, and it functions in a very similar manner to yours."