As·co·my·ce·tes n. pl. Bot. A large class of higher fungi distinguished by septate hyphæ, and by having their spores formed in asci, or spore sacs; the sac fungi. It comprises many orders, among which are the yeasts, molds, mildews, truffles, morels, etc. The class is coextensive with the phylum Ascomycota. -- As*co*my*ce*tous a.
n : large class of higher fungi coextensive with division
Ascomycota: sac fungi [syn: class Ascomycetes]