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Comprehensive
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dish antenna a radio antenna with a round, concave reflector, used to receive or send satellite and microwave signals.
radio telescope a concave reflector or array of reflectors designed to collect and focus extraterrestrial radio waves for analysis.
searchlight a lamp, usu. with a reflector, that can direct a powerful beam of light in any direction.
solar furnace a furnace for heating, smelting, and the like, that uses a parabolic reflector to focus solar rays.