What do the Americans call the game which the British call naughts and crosses?

While players in the United Kingdom refer to this simple grid game as "noughts and crosses," their American counterparts call it by a more playful-sounding name. The British name is descriptive, with "nought" being a traditional term for the number zero (the 'O') and "crosses" referring to the 'X'. This name first appeared in print in the mid-19th century. Although the game is the same, the terminology reflects a distinct linguistic divergence between the two countries.

The American term for the game has less certain origins. The switch from "noughts and crosses" to "tic-tac-toe" in the United States occurred during the 20th century. One theory is that the name is onomatopoeic, derived from the repetitive tapping or clicking sound of a pencil on a slate, a common medium for the game. Another possibility is that the name evolved from "tick-tack," an old version of backgammon mentioned as far back as 1558. The first printed reference to a game called "tick-tack-toe" appeared in 1884, though it described a different children's game entirely.

Despite its common modern names, the game's history stretches back thousands of years. An early form of the game was played in the Roman Empire around the first century BC under the name "terni lapilli," which translates to "three pebbles at a time." In that version, players used only three markers each and had to move them into empty spaces to continue the game. Even earlier evidence of similar three-in-a-row game boards has been discovered on ancient Egyptian roofing tiles that date to approximately 1300 BC.