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 Juneberry, serviceberry, shadblow, shadbush, service tree - any of various North American trees or shrubs having showy white flowers and edible blue-black or purplish fruit |