prism
noun/ˈprɪzəm/
/ˈprɪzəm/
- (geometry) a solid figure with ends that are parallel (= the same distance apart at every point) and of the same size and shape, and with sides whose opposite edges are equal and parallelTopics Colours and Shapesc2
- a clear 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
Word Originlate 16th cent.: via late Latin from Greek prisma ‘thing sawn’, from prizein ‘to saw’.
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prism