əˌgarəˈkā(ˌ)lēz noun plural
Usage: capitalized
Etymology: New Latin, from Agaricus + -ales
: an extensive order of basidiomycetous fungi that includes the typical gilled mushrooms and a number of related forms all having the basidia produced in a distinct hymenial fruiting layer usually spread over the surface of a definite but transitory fruiting body which may be flat or be supinate, simply or compoundly club-shaped, or with the surface increased by pores, gills, or spines