Noun | 1. | ![]() rosid dicot genus - a genus of dicotyledonous plants family Rosaceae, Rosaceae, rose family - a large family of dicotyledonous plants of order Rosales; have alternate leaves and five-petaled flowers with numerous stamens cinquefoil, five-finger - any of a numerous plants grown for their five-petaled flowers; abundant in temperate regions; alleged to have medicinal properties |