'subclass Dilleniidae' definitions:

noun

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, subclass Dilleniidae]