knucklebonePronunciation: /ˈnʌklbəʊn/Definition of knucklebone noun 1a bone forming or corresponding to a knuckle. a knuckle of meat. 2 (knucklebones) animal knucklebones used in the game of jacks. the game of jacks. knucklebone in other Oxford dictionaries Definition of knucklebone in the US English dictionary
