peri·spo·ri·a·ce·ae \ˌperəˌspōrēˈāsēˌē\noun plural Usage: capitalized Etymology: New Latin, from Perisporium, type genus (from peri- + -sporium) + -aceae 1.in some classifications: a family of fungi placed in the order Perisporiales and characterized by dark-colored mycelium 2.in some classifications: a family coextensive with or including Erysiphaceae • peri·spo·ri·a·ceous\| ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷|āshəs\adjective