prism [prisms]◼◼◼(block used to split or reflect light) noun [UK: ˈprɪ.zəm] [US: ˈprɪ.zəm]A prism decomposes light. = Un prisme décompose la lumière.
prism [prisms]◼◼◼(geometry: polyhedron with parallel ends of the same size and shape) noun [UK: ˈprɪ.zəm] [US: ˈprɪ.zəm]A prism decomposes light. = Un prisme décompose la lumière.