as·​per·​gil·​lus | \ -ˈji-ləs \
plural aspergilli\ -​ˈji-​ˌlī \

Definition of aspergillus

: any of a genus (Aspergillus) of ascomycetous fungi with branched radiate sporophores including many common molds

Examples of aspergillus in a Sentence

Recent Examples on the Web

Rice wine production requires growing the mold aspergillus oryzae (commonly known as koji) onto rice. Wei Tchou, Vogue, "New York’s First Sake Brewery Considers the Art of American Rice Wine," 24 Oct. 2018 Ancient Chinese brewers would add a fungus called aspergillus to the rice; the spores release enzymes that break down starch into fermentable sugars. Julia Thiel, Chicago Reader, "Ancient Chinese techniques inspired the Field Museum and Off Color to make an extraordinary new beer," 11 July 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'aspergillus.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of aspergillus

1751, in the meaning defined above

History and Etymology for aspergillus

New Latin, genus name, from aspergillum

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The first known use of aspergillus was in 1751

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More Definitions for aspergillus


as·​per·​gil·​lus | \ -ˈjil-əs \

Medical Definition of aspergillus

1 capitalized : a genus of ascomycetous fungi with branched radiate sporophores including many common molds
2 plural aspergilli\ -​ˈjil-​ˌī , -​(ˌ)ē \ : any fungus of the genus Aspergillus

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