CUBOID

I. ˈkyüˌbȯid adjective

Etymology: New Latin cuboides, from Greek kyboeidēs cubelike, from kybos cube + -oeidēs -oid — more at cube

: approximately cubic in shape ; specifically : being the outermost of the distal row of tarsal bones of many of the higher vertebrates that supports the fourth and fifth metatarsals and is considered as representing the fused fourth and fifth distal tarsal bones

II. noun

( -s )

Etymology: New Latin cuboides, from cuboides, adjective

1. : a rectangular parallelepiped

2. : the cuboid bone