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Coprinus

noun
Cop·​ri·​nus | \ˈkäprənəs, kəˈprīnəs\

Definition of Coprinus 

: a genus of black-spored agarics of the family Agaricaceae in which the pileus breaks down at maturity into an inky fluid — see shaggymane

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History and Etymology for Coprinus

New Latin, from Greek koprinos of dung, from kopros dung; from the habitat of some species

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