aspergillin

noun

as·​per·​gil·​lin ˌas-pər-ˈjil-ən 

1

: an amorphous black pigment found in the spores of various fungi of the genus Aspergillus

2

: an antibacterial substance isolated from two molds of the genus Aspergillus (A. flavus and A. fumigatus) and reported to possess activity against both gram-positive and gram-negative bacteria