retroreflector

noun
ret·​ro·​re·​flec·​tor | \ ˌre-trō-ri-ˈflek-tər How to pronounce retroreflector (audio) \

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

Examples of retroreflector in a Sentence

Recent Examples on the Web Its glittering ‘eyes’ were the glass retroreflector beads destined to snoop on unsuspecting targets. David Hambling, Popular Mechanics, "In the 1970s, the CIA Created a Robot Dragonfly Spy. Now We Know How It Works.," 18 Feb. 2020 In practice, these retroreflectors acted as a remote microphone to eavesdrop on any conversation. David Hambling, Popular Mechanics, "In the 1970s, the CIA Created a Robot Dragonfly Spy. Now We Know How It Works.," 18 Feb. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'retroreflector.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of retroreflector

1946, in the meaning defined above

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The first known use of retroreflector was in 1946

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Cite this Entry

“Retroreflector.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/retroreflector. Accessed 2 Dec. 2020.

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