from The American Heritage® Dictionary of the English Language, 4th Edition
- n. See omasum.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. omasum
from the GNU version of the Collaborative International Dictionary of English
- n. The third division, or that between the reticulum, or honeycomb stomach, and the abomasum, or rennet stomach, in the stomach of ruminants; the omasum; the psalterium. So called from the numerous folds in its mucous membrane. See Illust of ruminant.
from The Century Dictionary and Cyclopedia
- The third stomach of a ruminant, technically named the omasum or psalterium: so called from the many parallel folds or layers like the leaves of a book.
Sorry, no etymologies found.