railhead

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railhead

1. a terminal of a railway
2. the farthest point reached by completed track on an unfinished railway
3. the upper part of a railway rail, on which the traffic wheels run
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

railhead

[′rāl‚hed]
(civil engineering)
The topmost part of a rail, supporting the wheels of railway vehicles.
A point at which railroad traffic originates and terminates.
The temporary ends of a railroad line under construction.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.