cuboid

Concise Oxford English Dictionary © 2008 Oxford University Press:
cuboid /ˈkjuːbɔɪd/

▶adjective more or less cubic in shape. ▶noun

• 1 Geometry a solid which has six rectangular faces at right angles to each other.

• 2 (also cuboid bone) Anatomy a squat tarsal bone on the outer side of the foot, articulating with the heel bone and the fourth and fifth metatarsals.

– derivatives
cuboidal adjective.