Dominoes is the name of the small tiles used in a table top game and of the game itself. Each domino usually has between zero and six dots at either end, but there are sets with more. In the AI Book they are used in a simple board game placing dominoes, which ignores the numbers on the tiles, to illustrate game trees
Used in Chap. 11: pages 161, 162, 164
Links:
Encyclopedia Britanica:
domino game piece
coolmathgames.com:
domonoes – play online
Wikipedia:
Dominoes