Definitions for abomasumˌæb əˈmeɪ səm
Random House Webster's College Dictionary
ab•o•ma•sum*ˌæb əˈmeɪ səm(n.)(pl.)-sa
the fourth or true stomach of the cow and other ruminants, from which partially fermented and digested food is passed to the small intestine.
Origin of abomasum:
1700–10; < NL; see ab -, omasum
abomasum, fourth stomach(noun)
the fourth compartment of the stomach of a ruminant; the one where digestion takes place
The fourth or digestive stomach of a ruminant, which leads from the third stomach, the omasum.
Origin: New Latin, from ab + omasum
alt. of Abomasus
U.S. National Library of Medicine
The fourth stomach of ruminating animals. It is also called the "true" stomach. It is an elongated pear-shaped sac lying on the floor of the abdomen, on the right-hand side, and roughly between the seventh and twelfth ribs. It leads to the beginning of the small intestine. (From Black's Veterinary Dictionary, 17th ed)