REFLECTOR
reflector
(noun) device that reflects radiation
Source: WordNet® 3.1
Etymology
Noun
reflector (plural reflectors)
Something which reflects heat, light or sound, especially something having a reflecting surface.
A reflecting telescope.
A small, often red, reflecting disk on the rear of a vehicle or bicycle that reflects the headlights of other vehicles.
A safety reflector.
One who reflects on something; one who thinks or considers at length.
Source: Wiktionary
Re*flect"or (-er), n. Etym: [Cf. F. réflecteur.]
1. One who, or that which, reflects. Boyle.
2. (Physics)
(a) Something having a polished surface for reflecting light or heat,
as a mirror, a speculum, etc.
(b) A reflecting telescope.
(c) A device for reflecting sound.
Source: Webster’s Unabridged Dictionary 1913 Edition