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| o·ma·sum [ ō máyssəm ] (plural o·ma·sa [ ō máyssə ]) |
noun |
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| Definition: |
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ruminant's third stomach: the third compartment of the stomach of a cow or other ruminant, situated between the abomasum and the reticulum. The inner surface has folds that break up food particles.
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| [Early 18th century. < Latin, "bullock's tripe"] |
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