/ Dictionary / Index R rumen: Meaning and Definition of Find definitions for: ru•men Pronunciation: (r'min), [key] — pl. -mi•na the first stomach of ruminating animals, lying next to the reticulum. See diag. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rumen (Thesaurus) Rumelia Rumford Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language