/ Dictionary / Index E extine: Meaning and Definition of Find definitions for: ex•tine Pronunciation: (ek'stēn, -stīn), [key] — n. Bot. exine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. extinctive extinguish Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language