Definitions for "Fly line"
Keywords:  dacron, taper, braided, nylon, sink
A specially designed line for fly fishing, usually 80 to 90 feet long. It supplies the weight needed to cast relatively weightless flies.
Made of a tapered plastic coating over a braided Dacron or nylon core; available in several tapers and in floating, sinking, and sink-tip styles (see double taper, shooting head, weight forward, sink-tip, and floating fly line). Also available in some of the most insane nitro burning funny colors known to man.
A weighted line which is cast out onto the water to deliver the fly to the desired location. Can be found in many densities and tapers.