electro-optics

plural noun
elec·​tro-op·​tics | \i-ˌlek-trō-ˈäp-tiks \

Definition of electro-optics 

1 singular in construction : a branch of physics that deals with the effects of an electric field on light traversing it

2 : electro-optical devices

First Known Use of electro-optics

circa 1889, in the meaning defined at sense 1

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The first known use of electro-optics was circa 1889

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