rumen Rumelian • rumenitis · · · Info · Definitions · Synonyms · Characters · · rumen · · Text Latin · · Script 5 · · Length 2 · · Syllables Definitions · · · (noun) the first compartment of the stomach of a ruminant; here food is collected and returned to the mouth as cud for chewing. Synonyms: first stomach. · · Noun Definition 1 Synonyms · · · first stomach · · Synonym 1 Characters · · e latin small letter e U+0065 m latin small letter m U+006D n latin small letter n U+006E r latin small letter r U+0072 u latin small letter u U+0075