ETYM Old Eng. pouke; cf. OSw. puke, Icel. pűki an evil demon, W. pwca a hobgoblin. Related to Poker a bugbear, Pug.
A vulcanized rubber disk 3 inches in diameter that is used instead of a ball in ice hockey; SYN. hockey puck.

A mischievous sprite.
Or Robin Goodfellow or Hobgoblin; In English folklore, a mischievous fairy who will play tricks on travelers, assume various shapes, or even spoil the milk. His name is related to “pixie”.
He appears as the servant of the fairy king Oberon in Shakespeare’s A Midsummer Night’s Dream.

A pointing device used with a graphics tablet. A puck, which is often used in engineering applications, is a mouselike device with buttons for selecting items or choosing commands and a clear plastic section extending from one end with cross hairs printed on it. The intersection of the cross hairs on the puck points to a location on the graphics tablet, which in turn is mapped to a specific location on the screen. Because the puck’s cross hairs are on a transparent surface, a user can easily trace a drawing by placing it between the graphics tablet and the puck and moving the cross hairs over the lines of the drawing. See also graphics tablet, stylus.