Noun | 1. | ![]() dilleniid dicot genus - genus of more or less advanced dicotyledonous trees and shrubs and herbs Clusiaceae, family Clusiaceae, family Guttiferae, Guttiferae, St John's wort family - widely distributed family of chiefly tropical trees and shrubs and vines that produce oils and resins and some usable timber ironwood, ironwood tree, Mesua ferrea, rose chestnut - handsome East Indian evergreen tree often planted as an ornamental for its fragrant white flowers that yield a perfume; source of very heavy hardwood used for railroad ties |