/ Dictionary / Index R rectirostral: Meaning and Definition of Find definitions for: rec•ti•ros•tral Pronunciation: (rek"tu-ros'trul), [key] — adj. (of a bird) having a straight bill. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rectilinear rectitude 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