/ Dictionary / Index C conidium: Meaning and Definition of Find definitions for: co•nid•i•um Pronunciation: (kō-nid'ē-um, ku-), [key] — pl. -nid•i•a (in fungi) an asexual spore formed by abstriction at the top of a hyphal branch. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: conidium (Thesaurus) conidiophore conifer Related Content Daily Word Quiz: dentifrice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language