Polyhedron

n. [Gr. πολυέδρος, with many seats or sides, from πολύς, many, and ἕδρα, a seat or side; Fr. polyèdre, It. & Sp. poliedro.]

1. (Geom.) A body or solid contained by many sides or planes.
2. (Opt.) A polyscope, or multiplying glass.