PRISM


Meaning of PRISM in English

/ ˈprɪzəm; NAmE / noun

1.

( geometry ) a solid figure with ends that are parallel and of the same size and shape, and with sides whose opposite edges are equal and parallel

2.

a transparent glass or plastic object, often with ends in the shape of a triangle, which separates light that passes through it into the colours of the rainbow

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WORD ORIGIN

late 16th cent.: via late Latin from Greek prisma thing sawn, from prizein to saw.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.