/ Dictionary / Index R rostra: Meaning and Definition of Find definitions for: ros•tra Pronunciation: (ros'tru), [key] — n. a pl. of Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rostra (Thesaurus) Rostovtzeff rostral Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language