Pol′y‐he″dron (?), n.; pl. E. Polyhedrons. (#), L. Polyhedra (#). [NL., fr. Gr. � with many seats or sides; πολύσ many + � a seat or side: cf. F. polyèdre.] 1. (Geom.) A body or solid contained by many sides or planes.
2. (Opt.) A polyscope, or multiplying glass.