E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Billiards.
A corrupt form of the French billard. Autrefois, le bâton avec lequel on poussait les billes; then la table verte sur laquelle on joue; and, lastly, the game itself.
1
Similar plural forms are the games called bowls, cards, dominoes, draughts, marbles, quoits, skittles, tops, etc.