In optics, a prism is a transparent optical element with flat, polished surfaces that refract light. The traditional geometrical shape is that of a triangular prism with a triangular base and rectangular sides, and in colloquial use "prism" usually refers to this type.
Usage
See Special:Whatlinkshere/Etymology:Prism for a list of articles using this term.
This is an etymology page: a page detailing the origins of terminology used in the series in regards to real world culture and history.
