prism
noun [ C ] uk/ˈprɪz.əm/ us/ˈprɪz.əm/
physics specialized 棱镜
a transparent glass or plastic object that separates white light that passes through it into different colours
Newton split white light into its spectrum of colours by beaming it through a prism.
This vision consists of luminous, bright, flickering colours of the spectrum, like a prism catching light.