What is "socket pole"

Socket \Sock"et\, n. [OE. soket, a dim. through OF. fr. L. soccus. See Sock a covering for the foot.]

1. An opening into which anything is fitted; any hollow thing or place which receives and holds something else; as, the sockets of the teeth.

   His eyeballs in their hollow sockets sink.
   --Dryden.

2. Especially, the hollow tube or place in which a candle is fixed in the candlestick.

3. (Electricity) the receptacle of an electric lamp into which a light bulb is inserted, containing contacts to conduct electricity to the bulb.

4. (Electricity) the receptacle fixed in a wall and connected by conductive wiring to an electrical supply, containing contacts to conduct electricity, and into which the plug of an electrical device is inserted; -- called also a wall socket or outlet. The socket will typically have two or three contacts; if three, the third is connected to a ground for safety.

   And in the sockets oily bubbles dance.
   --Dryden.

   Socket bolt (Mach.), a bolt that passes through a thimble that is placed between the parts connected by the bolt.

   Socket chisel. Same as Framing chisel. See under Framing.

   Socket pipe, a pipe with an expansion at one end to receive the end of a connecting pipe.

   Socket pole, a pole armed with iron fixed on by means of a socket, and used to propel boats, etc. [U.S.]

   Socket wrench, a wrench consisting of a socket at the end of a shank or rod, for turning a nut, bolthead, etc., in a narrow or deep recess.

n. (context US English) A pole armed with iron fixed on by means of a socket, and used to propel boats, etc.