/ Dictionary / Index U uredium: Meaning and Definition of Find definitions for: u•re•di•um Pronunciation: (yoo-rē'dē-um), [key] — pl. -di•a uredinium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. urediospore uredo Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language