/ Dictionary / Index A aspergillus: Meaning and Definition of Find definitions for: as•per•gil•lus Pronunciation: (as"pur-jil'us), [key] — pl. -gil•li any fungus of the genus Aspergillus, having sporophores with a bristly, knoblike top. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aspergillus (Thesaurus) aspergillum asperity Related Content Daily Word Quiz: laudable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language