fox grape: purplish-black wild grape of the eastern United States with tough skins that slip easily from the flesh; cultivated in many varieties
slipskin grape: a grape whose skin slips readily from the pulp
forceps delivery: delivery in which forceps are inserted through the vagina and used to grasp the head of the fetus and pull it through the birth canal; since the forceps can injure the fetus this procedure has generally given way to cesarean deliveries