retroreflector

[ re-troh-ri-flek-ter ]

/ ˌrɛ troʊ rɪˈflɛk tər /

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noun

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Question 1 of 7

Which sentence is correct?

His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

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Origin of retroreflector

First recorded in 1945–50; retro- + reflector

Words nearby retroreflector

retronym, retro-operative, retropack, retropulsion, retroreflective, retroreflector, retrorocket, retrorse, retroserrate, retroserrulate, retrosexual