Omasum n. : The third division of the stomach of ruminants. See Manyplies, and Illust. under Ruminant.

Example:
what is the tisseue called in the Omasum, in a cow's stomach?

Taxonomy
omasum, particles, free encyclopedia, compartment, rumen fermentation, absorbed, chinese dim sum, fardel, ruminant stomach, search, Ngau, Yip, Chinese, pork liver, product, the bible, psalterium, absorption.

Defination from the web:
omasum allows large particles, which still likely contain appreciable amounts of fermentable substrate, to be further digested in the reticulorumen. ... initiated in the reticulorumen can continue in the omasum, it does so in only limited quantities, so this ...