retroreflector

noun

ret·​ro·​re·​flec·​tor ˌre-trō-ri-ˈflek-tər How to pronounce retroreflector (audio)
: a device that reflects radiation (such as light) so that the paths of the reflected rays are parallel to those of the incident rays

Examples of retroreflector in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Additionally, an instrument known as a laser retroreflector array (LRA) on the top deck of the lander will be able to bounce laser light back at any incoming spacecraft – a vital capability to determine the locations of lunar landers more accurately. — Eric Lagatta, USA TODAY, 6 Mar. 2025 But there might be a simple, potentially inexpensive way to put a chill on urban heat: retroreflectors. — Rachel Ramirez, CNN, 11 Mar. 2024

Word History

First Known Use

1946, in the meaning defined above

Time Traveler
The first known use of retroreflector was in 1946

Rhymes for retroreflector

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Browse Nearby Words

retroreflection
retroreflector
retro-rocket
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Cite this Entry

“Retroreflector.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/retroreflector. Accessed 3 Apr. 2025.

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