knucklebone
nounEtymology From knuckle + bone.
1
A bone that forms a knuckle in the human hand, in an animal's paw or any bone that forms a similar bump.
2
Such a bone once used in knucklebones and other children's games of chance.
3
Slang A die.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.