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fiber optics

plural noun

1
: thin transparent fibers of glass or plastic that are enclosed by material of a lower refractive index and that transmit light throughout their length by internal reflections
also : a bundle of such fibers used in an instrument (as for viewing body cavities)
2
singular in construction : the technique of the use of fiber optics

Word History

First Known Use

1956, in the meaning defined at sense 1

Time Traveler
The first known use of fiber optics was in 1956

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