| Noun | 1. | order Rhamnales - an order of dicotyledonous plants plant order - the order of plants class Dicotyledonae, class Dicotyledones, class Magnoliopsida, Dicotyledonae, Dicotyledones, Magnoliopsida - comprising seed plants that produce an embryo with paired cotyledons and net-veined leaves; divided into six (not always well distinguished) subclasses (or superorders): Magnoliidae and Hamamelidae (considered primitive); Caryophyllidae (an early and distinctive offshoot); and three more or less advanced groups: Dilleniidae; Rosidae; Asteridae buckthorn family, family Rhamnaceae, Rhamnaceae - trees and shrubs usually thorny bearing drupaceous fruit many having medicinal value family Vitaceae, grapevine family, Vitaceae, Vitidaceae - a family of vines belonging to order Rhamnales |