the fourth and last compartment of the stomach of ruminants, which receives and digests food from the psalterium and passes it on to the small intestine
Word origin
C18: New Latin, from ab-1 + omāsum bullock's tripe
abomasum in American English
(ˌæbəˈmeɪsəm)
nounWord forms: pluralˌaboˈmasa (ˌæbəˈmeɪsə)
the fourth, or digesting, chamber of the stomach of a cud-chewing animal, as the cow