Definition of knucklebone
1
: a bone (such as a metatarsus or metacarpus of a sheep) used in games and formerly in divination
2
knucklebones plural in form but singular in construction
: a game played with knucklebones or jacks
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Merriam-Webster unabridged
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Time Traveler for knucklebone
The first known use of knucklebone was in 1577
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