railway line
         n 1: line that is the commercial organization responsible for
               operating a system of transportation for trains that pull
               passengers or freight [syn: {railway}, {railroad},
               {railroad line}, {railway line}, {railway system}]
         2: the road consisting of railroad track and roadbed [syn:
            {line}, {railway line}, {rail line}]

English Dictionary: relay link	by the DICT Development Group
From WordNet (r) 3.0 (2006) [wn]:
relay link n an amplifier for restoring the strength of a transmitted signal Synonym(s): booster, booster amplifier, booster station, relay link, relay station, relay transmitter