pylon

Concise Oxford English Dictionary © 2008 Oxford University Press:
pylon/ˈpʌɪlən/

▶noun

• 1 (also electricity pylon) a tall tower-like structure for carrying electricity cables.

  ■ a tower or post marking a path for light aircraft, cars, etc., especially in racing.

• 2 a structure on the wing of an aircraft supporting an engine or weapon.

• 3 N. Amer. a plastic cone used to mark areas of roads.

• 4 a monumental gateway to an ancient Egyptian temple, formed by two truncated pyramidal towers.

– origin C19: from Gk pulōn, from pulē ‘gate’.