ret·ro·re·flec·tor
| \ ˌre-trō-ri-ˈflek-tər
\
\
Definition of retroreflector
: a device that reflects radiation (such as light) so that the paths of the reflected rays are parallel to those of the incident rays
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“Retroreflector.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/retroreflector. Accessed 16 May. 2022.
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Time Traveler for retroreflector
The first known use of retroreflector was in 1946
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