Pylon

n.	1.	A low tower, having a truncated pyramidal form, and flanking an ancient Egyptian gateway. Massive pylons adorned with obelisks in front. - J. W. Draper.
	2.	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) Formerly, a starting derrick (the use of which is now abandoned) for an aeroplane.

Noun	1.	pylon - a tower for guiding pilots or marking the turning point in a race
	2.	pylon - a large vertical steel tower supporting high-tension power lines; "power pylons are a favorite target for terrorists" Synonyms: power pylon

French door, antenna tower, archway, back door, barbican, barway, beacon, beam, belfry, bell tower, bulkhead, campanile, carriage entrance, cellar door, cellarway, colossus, column, cupola, derrick, dome, door, doorjamb, doorpost, doorway, fan marker, fire tower, flare path, front door, gate, gatepost, gateway, hatch, hatchway, lantern, lighthouse, lintel, marker, martello, martello tower, mast, minaret, monument, obelisk, observation tower, pagoda, pilaster, pillar, pinnacle, pole, porch, portal, porte cochere, postern, propylaeum, pyramid, racon, radar beacon, radio beacon, scuttle, shaft, side door, skyscraper, spire, standpipe, steeple, stile, storm door, stupa, television mast, threshold, tollgate, tope, tour, tower, trap, trap door, turnpike, turnstile, turret, water tower, wind cone, wind indicator, wind sock, windmill tower