py·lon /ˈpaɪˌlɑn, lən/
  塔門,路標塔
  py·lon /ˈpaɪˌlɑn, lən/ 名詞
  臨時假肢
  Py·lon n.  (a) A low tower, having a truncated pyramidal form, and flanking an ancient Egyptian gateway.
     Massive pylons adorned with obelisks in front.   --J. W. Draper.
  (b) An Egyptian gateway to a large building (with or without flanking towers).
  2. A tower, commonly of steelwork, for supporting either end of a wire, as for a telegraph line, over a long span.
  3.  Aeronautics (a) Formerly, a starting derrick (the use of which is now abandoned) for an aeroplane. (b) A post, tower, or the like, as on an aerodrome, or flying ground, serving to bound or mark a prescribed course of flight.
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  pylon
       n 1: a tower for guiding pilots or marking the turning point in a
            race
       2: a large vertical steel tower supporting high-tension power
          lines; "power pylons are a favorite target for terrorists"
          [syn: power pylon]