any of a widespread genus (Aspergillus) of ascomycetous fungi bearing chains of spores attached to stalks on the swollen end of a threadlike branch: their purified enzymes are used in food production
See aspergillus in American Heritage Dictionary 4
(ăsˌpər-jĭlˈəs)
nounpl.as·per·gil·li(-jĭlˈīˌ)
Any of various fungi of the genus Aspergillus, which includes many common molds.