Ascomycetes

noun

1. large class of higher fungi coextensive with division Ascomycota: sac fungi

   noun.plant

   Synonyms class ascomycetes

   Source: WordNet 3.0

2. 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.

   noun

   Source: webster1913