Par`al*lel`o*pi"ped (?), n. [Gr. a body with parallel surfaces; parallel + a plane surface, on the ground, or level with it, level, flat; on + the ground: cf. F. parall'elopipede.] Geom.
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.
© Webster 1913.