Answer: knucklebone

AnswerCrossword Clue
KNUCKLEBONEIt's in your hand
knuckleboneA bone forming or corresponding to a knuckle
knuckleboneThe game of jacks
knuckleboneAnimal knucklebones used in the game of jacks
knuckleboneA knuckle of meat
knucklebonethe bone of the knuckle