-lə̇n noun
( -s )
Etymology: International Scientific Vocabulary aspergill- (from New Latin Aspergillus ) + -in
1. : an amorphous black pigment found in the spores of various fungi of the genus Aspergillus
2. : an antibacterial substance obtained from cultures of two molds ( Aspergillus flavus and A. fumigatus ) reported to possess activity against both gram-positive and gram-negative bacteria