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Noun prism has 2 senses
  1. prism - a polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms
    --1 is a kind of     polyhedron
    --1 has particulars:
     parallelepiped, parallelopiped, parallelepipedon, parallelopipedon; quadrangular prism; triangular prism
  2. prism, optical prism - optical device having a triangular shape and made of glass or quartz; used to deviate a beam or invert an image
    --2 is a kind of optical device
    --2 is a part of
     biprism; telescope, scope; spectroscope, prism spectroscope
     --2 has particulars: erecting prism
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