/ Dictionary / Index U urediospore: Meaning and Definition of Find definitions for: u•re•di•o•spore Pronunciation: (yoo-rē'dē-u-spôr", -spōr"), [key] — n. Mycol. the spore of the rust fungi that appears between the aeciospore and the teliospore, commonly the summer spore. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. uredinium uredium 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