"optical prism"@en-us . . . . . "0"^^ . "prism"@en-us . . . . "0"^^ . . "optical device having a triangular shape and made of glass or quartz; used to deviate a beam or invert an image"@en-us . . . . . "prism"^^ . . . . . . . . . . . . . . . . "04005340-n"^^ . . . "103174157"@en-us . "optical device having a triangular shape and made of glass or quartz; used to deviate a beam or invert an image"@en-us . "103853923"@en-us . "104005340"^^ . . .