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| ru·men [ r men, rmən ] (plural ru·mi·na [ rmənə ] or ru·mens) |
noun |
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first stomach of ruminant animal: the large first chamber of a ruminant animal's stomach in which microorganisms break down plant cellulose before the food is returned to the mouth as cud for additional chewing
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| [Early 18th century. < Latin] |
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 ru·mi·nal adjective |
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