/ Dictionary / Index U ultratropical: Meaning and Definition of Find definitions for: ul•tra•trop•i•cal Pronunciation: (ul"tru-trop'i-kul), [key] — adj. outside the tropics. hotter than the average or usual tropical climate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ultrathin ultraviolet Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language