/ Dictionary / Index R redia: Meaning and Definition of Find definitions for: re•di•a Pronunciation: (rē'dē-u), [key] — pl. -di•ae a cylindrical larval stage of some trematodes, produced by a sporocyst and giving rise to daughter rediae or to cercariae. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Redi redial Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language