nought : Idioms & Phrases
aleph-nought
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noun the smallest infinite integer
aleph-null; aleph-zero.
WordNet
noughts and crosses
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noun a game in which two players alternately put crosses and circles in one of the compartments of a square grid of nine spaces; the object is to get a row of three crosses or three circles before the opponent does
tic-tac-toe; ticktacktoe; tick-tack-toe; ticktacktoo; tit-tat-toe.
