Noun | 1. | ![]() class - (biology) a taxonomic group containing one or more orders Ascomycota, Ascomycotina, subdivision Ascomycota, subdivision Ascomycotina - a large subdivision of Eumycota including Hemiascomycetes and Plectomycetes and Pyrenomycetes and Discomycetes; sac fungi; in some classification systems considered a division of the kingdom Fungi Euascomycetes, subclass Euascomycetes - category not used in many classification systems Discomycetes, subclass Discomycetes - a large and taxonomically difficult group of Ascomycetes in which the fleshy fruiting body is disklike or cup-shaped family Morchellaceae, Morchellaceae - a family of edible fungi including the true morels |