Translation guide
The metacarpus is the part of the hand between the wrist and the fingers, consisting of five metacarpal bones. In Japanese, this is typically referred to using anatomical terms.
Referring to the metacarpus as a whole in medical or anatomical contexts.
Describing the metacarpus in non-specialist language, such as when pointing to the back of the hand.
Metacarpal fractures are common in boxers.
I fell and hit the bones on the back of my hand.
Literally 'bones of the palm', used when referring to the metacarpus from the palm side.
The bones in my palm hurt.