fourth stomach

Thesaurus

Noun

1.

fourth stomach - the fourth compartment of the stomach of a ruminant; the one where digestion takes placeabomasumruminant - any of various cud-chewing hoofed mammals having a stomach divided into four (occasionally three) compartmentsstomach, tum, tummy, breadbasket - an enlarged and muscular saclike organ of the alimentary canal; the principal organ of digestion