optical fiber

n.

1.

(Communications) A thin fiber of very pure glass used to carry signals transmitted by means of light. It has much greater information-carrying capacity than a copper wire, and in the 1990's became a dominant means of transmitting telephone communications over long distances.

Noun

1.

optical fiber - a very thin fiber made of glass that functions as a waveguide for light; used in bundles to transmit images Synonyms: glass fiber, glass fibre, optical fibre

optical fiber - optical fibre

fiber, fiber optic cable, fiberscope, fibre, fibre optic cable, glass fiber, glass fibre, optical fibre