omasum
Syllabification: (o·ma·sum)
Pronunciation: /ōˈmāsəm/
Definition of omasum
noun ( plural omasa /-sə/)
Zoology- the muscular third stomach of a ruminant animal, between the reticulum and the abomasum. Also called psalterium.
Origin:
early 18th century: from Latin, literally 'bullock's tripe'