/ Dictionary / Index U uredinium: Meaning and Definition of Find definitions for: u•re•din•i•um Pronunciation: (yoor"i-din'ē-um), [key] — pl. -din•i•a the fruiting body of the rust fungi that bears urediospores. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. urease urediospore 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