from The Century Dictionary.
- In billiards, to carom.
- noun [F.] The écu of Flanders struck by Louis XIV. for 80 sols, with the quartered arms of France and Burgundy.
- noun In billiards: The red ball placed on the mark.
- noun A carom (which see).
Sorry, no etymologies found.
More literally, a carambole is a somewhat acidic fruit characterized by its star shape.
Carom is a shortening of carambole, an obsolete three-ball game with a similar object.
The origin of carambole is the East Indian carambola tree and its fruit, but their connection with the game is obscure.