metacarpal bones I-V

met·a·car·pal bones [I-V]

(met'ă-kahr'păl bōnz)
Five long bones (numbered I-V, beginning with the bone on the radial or thumb side) forming the skeleton of the metacarpus or palm; they articulate with the bones of the distal row of the carpus and with the five proximal phalanges.
Synonym(s): ossa metacarpi.