| Noun | 1. | Tuberales - small order of fungi belonging to the subdivision Ascomycota having closed underground ascocarpsfungus order - the order of fungi family Tuberaceae, Tuberaceae - family of fungi whose ascocarps resemble tubers and vary in size from that of an acorn to that of a large apple 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 |