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Definition of Bone, cuboid
Medically reviewed by Dr. Otari Nergadze, Neurosurgeon | Updated: January 2026
Bone, cuboid: The outer bone in the instep of the foot. It is called the cuboid bone because it is shaped like a cube. The cuboid bone is jointed in back with the heel bone (calcaneus) and in front with the bones just behind the fourth and fifth toes (metatarsals).