Meaning of “bone” - Learner’s Dictionary

bone

noun [ C, U ] us uk /bəʊn/
The doctor thinks he may have chipped a bone in his wrist.Thousands of dinosaur bones have been unearthed in China.Scientists have dated the bones to 10,000 BC.The bones of the skull are not properly fused at birth.Luckily, I've never broken a bone.

B1 one of the hard pieces that make the structure inside a person or animal:

He broke a bone in his hand.

(Definition of “bone noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)