Parallelopiped
Parallelopiped (par`al*lel`o*pī"ped) , noun
[Greek para`llhlos parallel + 'epi`pedon a plane surface, 'epi`pedos on the ground, or level with it, level, flat; 'epi` on + pe`don the ground: compare French parallélopipède.]
(Geometry) A solid, the faces of which are six parallelograms, the opposite pairs being parallel, and equal to each other; a prism whose base is a parallelogram.