Topic: OPTICS

Date: 1500-1600
Language: Late Latin
Origin: prisma, from Greek, 'something cut with a saw'; because of its shape

prism

noun
     
pris‧m [countable]
1HPO a transparent block of glass that breaks up white light into different colours
2 technicalHPO a solid object with matching ends and several sides which are the same width all the way up

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