Ascomycetes

As`co*my*ce"tes, n. pl. [NL.; ascus + Gr., , fungus.] (Bot.)

Defn: A large class of higher fungi distinguished by septate hyphæ, and by having their spores formed in asci, or spore sacs. It comprises many orders, among which are the yeasts, molds, mildews, truffles, morels, etc. -- As`co*my*ce"tous (#), a.