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n. pl. psal·te·ri·a (-tîr′ē-ə)
The omasum.

[Late Latin psaltērium, psalter (so called because when slit open its folds fall apart like the leaves of a book); see Psalter.]

psal·te′ri·al adj.


n, pl -teria (-ˈtɪərɪə)
(Zoology) the third compartment of the stomach of ruminants, between the reticulum and abomasum. Also called: omasum
[C19: from Latin psaltērium Psalter; from the similarity of its folds to the pages of a book]


(oʊˈmeɪ səm)

n., pl. -sa (-sə).
the third stomach of a ruminant, between the reticulum and the abomasum.
[1700–10; < New Latin; Latin omāsum ox's tripe]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.psalterium - the third compartment of the stomach of a ruminantpsalterium - the third compartment of the stomach of a ruminant
ruminant - any of various cud-chewing hoofed mammals having a stomach divided into four (occasionally three) compartments
stomach, tum, tummy, breadbasket - an enlarged and muscular saclike organ of the alimentary canal; the principal organ of digestion