D defs.my
Entry 2 senses Webster, 1913

Polyhedron

/pälˌ-ēhˌ-ēd'-rən/ · Pol·y·he·dron · IPA /ˌpɑliˈhidɹən/
01 n. A body or solid contained by many sides or planes.
pl. Polyhedrons, Polyhedra ((#))
  1. 1.
    A body or solid contained by many sides or planes.(Geom.)
  2. 2.
    A polyscope, or multiplying glass.(Opt.)