Definition of: parallelepiped

(par′ə·lel′ə·pī′ped,-pip′id) noun
A prism with six faces, each of which is a parallelogram. Also par′al·lel′o·pi′ped, par′al·lel′e·pip′e·don, par′al·lel′o·pip′e·don (-pip′ə·don, -pī′·pə-). [<Gk. parallēlepipedon <parallēlos parallel + epipedon a plane surface <epi- upon + pedon ground]