Alternative term: Parabolic Mirror
A type of mirror, particularly used in projectors, the reflecting surface of which is a paraboloid of revolution. Light rays emitted by a point source placed at the focus of the paraboloid are rendered parallel to the optical axis (2-2-110) after reflection.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM