a. and sb. Also Caroline. Applied to one of the balls in a particular game at billiards; also to the game in which this is used.

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1820.  Hoyle’s Games Impr., 372. The Caroline or Carline game is played either on a round or square table with five balls, two white, one red, another blue, and the caroline ball yellow.

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1863.  Pardon, Hoyle’s Games, 408. The carline holed in a centre pocket scores six.

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