parallelepipedon n 1: a prism whose bases are parallelograms [syn: {parallelepiped}, {parallelopiped}, {parallelepipedon}, {parallelopipedon}]
parallelepipedon \parallelepipedon\ n. (Geometry) Same as {parallelepiped}. Syn: parallelepiped, parallelopiped, parallelopipedon. [WordNet 1.5]