py·lon 
(pīlŏn′)
(pīlŏn′)n.
1.
a. A movable, brightly colored cone or shaft of rubber that is used to signal something to be avoided, such as a hazard or work zone on a roadway.
b. Football A flexible, usually padded marker that stands upright at each corner of the end zone to facilitate judgments of close plays.
c. A tower marking a turning point in a race among aircraft.
2. A vertical supporting structure, especially:
a. A steel tower supporting high-tension wires.
b. A tower or shaft supporting a wind turbine.
c. A structure supporting a bridge deck.
3.
a. A large structure or group of structures marking an entrance or approach.
b. A monumental gateway in the form of a pair of tapered blocks serving as the entrance to an ancient Egyptian temple.
4. A structure that attaches an aircraft engine to a plane's wing or fuselage.
[Greek pulōn, gateway, from pulē, gate.]
pylontop: pylon supporting electric power transmission lines
bottom: main entrance to the Temple of Horus
Edfu, Egypt
pylon