ˌpithēˈāsēˌē noun plural
Usage: capitalized
Etymology: New Latin, from Pythium, type genus + -aceae
: a family of fungi (order Peronosporales) having sporangia usually borne successively and singly at the tips of branching sporangiophores which differ little if any from assimilative hyphae — see phytophthora , pythium
• pyth·i·a·ceous | ̷ ̷ ̷ ̷|āshəs adjective