/ Dictionary / Index R ramus: Meaning and Definition of Find definitions for: ra•mus Pronunciation: (rā'mus), [key] — pl. -mi a branch, as of a plant, vein, bone, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ramus (Thesaurus) ramulose ran Related Content Daily Word Quiz: abominable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language