What is the meaning of Pigtail?

Tobacco twisted into a string or roll.

A braided plait of hair; now especially, either of two braids or "tails" on the side of the head.

A person who wears a pigtail or queue.

A short length of twisted electrical wire.

The flamingo flower

The tail of a pig.

Twisted stent terminal; stent-end, usually but not necessarily a different fastened part.

Source: wiktionary.org