omasum

Noun

omasum (plural omasums or omasa)

1. The third compartment of the stomach of a ruminant; the lining of said compartment, regarded as a foodstuff.
   • The deer of the northern group are larger in body size and have well-developed rumino-reticulums, smaller omasums, and longer small intestines (Takatsuki 1988).2009, Seiki Takatsuki, “17: Geographical Variations in Food Habits of Sika Deer: The Northern Grazer vs. the Southern Browser”, in Dale R. McCullough, Seiki Takatsuki, Koichi Kaji, editors, Sika...
   • The omasum is a spherical organ filled with muscular laminae (an estimated 90 to 130 in the bovine omasum) that lie in sheets, much like the pages of a book (giving the omasum its colloquial name, book stomach).2018, Anna Dee Fails, Christianne Magee, Anatomy and Physiology of Farm Animals, Wiley Blackwell, page 385

   Synonyms:

   bible, leaf tripe, manyplies, psalterium