Entry 1 sense Webster, 1913

Omasum

· O·ma·sum · IPA /oʊˈmeɪsəm/

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

1.
The third division of the stomach of ruminants. See Manyplies, and Illust. under Ruminant.(Anat.) See: Manyplies, Ruminant