prism
noun /ˈprɪzəm/
/ˈprɪzəm/
- enlarge image(geometry
几何 棱柱体；棱柱 - 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
棱镜；三棱镜
词源late 16th cent.: via late Latin from Greek prisma ‘thing sawn’, from prizein ‘to saw’.