Glass, plastic, or hybrid fiber cable that transmits digital signals as light pulses.
[n] - a cable made of optical fibers that can transmit large amounts of information at the speed of light
A connection that uses light to transmit information. 
fibre optic cable noun a cable made of optical fibers that can transmit large amounts of information at the speed of light
Physical medium capable of conducting modulated light transmission. Compared with other transmission media, fiber-optic cable is more expensive, but is not susceptible to electromagnetic interference and is capable of higher data rates. Sometimes called optical fiber.