Dominoes
a game played with small flat rectangular pieces of ivory, about twice as long as they are broad. They are marked with spots varying in number.
When one player leads by laying down a domino, the next must follow by placing alongside of it another which has the same number of spots on one of its sides.
Thus, if the first player lays down 6-4, the second may reply with 4-8, or 6-7, etc.; in the former case he must turn in the 4, placing it beside the 4 of the first domino, so that the numbers remaining out will be 6-8; in the latter case he must turn in the 6 to the 6 in like manner, leaving 4-7, to which his opponent must now respond.
The player who cannot follow suit loses his turn, and the object of the game is to get rid of all the dominoes in hand, or to hold fewer spots than your opponent when the game is exhausted by neither being able to play. The game was invented in the 18th century.