Main Entry: fiber optics

Variant(s): or chiefly British fibre optics

Function: noun plural

1 : thin transparent fibers of glass or plastic that are enclosed by material of a lower index of refraction 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

—fi·ber–op·tic or chiefly British fi·bre–op·tic \ˈfī-bə-ˌräp-tik\ adjective