/ Dictionary / Index I idioblast: Meaning and Definition of Find definitions for: id•i•o•blast Pronunciation: (id'ē-u-blast"), [key] — n. Bot. a cell that differs greatly from the surrounding cells or tissue. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. idio- idiochromatic Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language