ˌkōnēōˈthirēəm noun
Usage: capitalized
Etymology: New Latin, from coni- (II) + thyr- (from Greek thyreos oblong shield, from thyra door) + -ium — more at door
: a form genus of imperfect fungi (family Sphaeropsidaceae) with dark olivaceous spores that includes a species ( C. diplodiella ) that causes white rot of grapes