Answer: reflectors

AnswerCrossword Clue
reflectorsREFLECTOR, something or someone that reflects
reflectorsAn object or device that reflects radio waves, seismic vibrations, sound, or other waves
reflectorsA piece of glass, metal, or other material for reflecting light in a required direction, e.g., a red one on the back of a motor vehicle or bicycle
reflectorsA reflecting telescope