Pronunciation: i- ˌ lek-tr ō - ' äp-ti-k ə l
Variant: or elec · tro-op · tic \ - ' äp-tik \
Function: adjective
Date: 1879
1 : of or relating to electro-optics
2 a : relating to or being a change in the refractive index of a material due to an electric field < electro-optical effect> b : using or being a material that exhibits electro-optical properties <an electro-optical crystal>
3 : relating to or being an electronic device for emitting, modulating, transmitting, or sensing light
– elec · tro-op · ti · cal · ly \ -k( ə -)l ē \ adverb