cuboid bone /kyo̅o̅″boid/ [Gk, kybos, cube, eidos, form] , the outer cuboidal tarsal bone on the lateral side of the foot, proximal to the fourth and fifth metatarsal bones. It articulates with the calcaneus, lateral cuneiform, and fourth and fifth metatarsal bones and occasionally with the navicular. Also called os cuboideum.
