Source : WordNet®

subclass Dilleniidae
     n : a group of families of more or less advanced trees and
         shrubs and herbs having either polypetalous or
         gamopetalous corollas and often with ovules attached to
         the walls of the ovary; contains 69 families including
         Ericaceae and Cruciferae and Malvaceae; sometimes
         classified as a superorder [syn: {Dilleniidae}]