different between ponytail vs pigtail

English

pony +? tail

ponytail (plural ponytails)

A hairstyle where the hair is pulled back and tied into a single "tail" which hangs down behind the head.

From pig +? tail.

pigtail (plural pigtails)

Tobacco twisted into a string or roll. [from 17th c.]
- 1828, JT Smith, Nollekens and His Times, Century Hutchinson 1986, p. 265:
  One person […] continued constantly to ply him with the very best pig-tail tobacco, which he had most carefully cut in very small pieces purposely for him.
A braided plait of hair; now especially, either of two braids or "tails" on the side of the head. [from 18th c.]
A short length of twisted electrical wire. [from 20th c.]
The flamingo flower.
The tail of a pig.
(medicine) Twisted stent terminal; Stent-end, usually but not necessarily a different fastened part.

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