Emily Dickinson Lexicon

PAR-AL-LEL-O-PI'PED, n. [parallel and Gr. επι, on, and πεδον, a plain.]

In geometry, a regular solid comprehended under six parallelograms, the opposite ones of which are similar, parallel and equal to each other, or it is a prism whose base is a parallelogram. It is always triple to a pyramid of the same base and highth. Or a parallelopiped it a solid figure bounded by six faces, parallel to each other two and two. – Harris. Encyc.