1. prism

noun. (ˈprɪzəm) Optical device having a triangular shape and made of glass or quartz; used to deviate a beam or invert an image.
Synonyms
spectroscope telescope erecting prism biprism scope optical prism optical device prism spectroscope
Etymology
prism (English)
prisma (Latin)
πρίσμα (Ancient Greek (to 1453))
πρίζειν (Ancient Greek (to 1453))

2. prism

noun. (ˈprɪzəm) A polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms.
Synonyms
parallelopiped triangular prism parallelepiped quadrangular prism parallelopipedon polyhedron parallelepipedon
Etymology
prism (English)
prisma (Latin)
πρίσμα (Ancient Greek (to 1453))
πρίζειν (Ancient Greek (to 1453))
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