prism

noun
prism \ ˈpri-zəm \
1570{ds||1||}
  • a polyhedron with two polygonal faces lying in parallel planes and with the other faces parallelograms
  • a transparent body that is bounded in part by two nonparallel plane faces and is used to refract or disperse a beam of light
  • a prism-shaped decorative glass luster
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