Alternative form of citation needed

(number theory, recreational mathematics) A magic square of order n containing the numbers 1 to n² and where each 2 × 2 subsquare sums to 2s, where s = n² + 1, and all pairs of integers distant n/2 along a (major) diagonal sum to s.

(number theory, recreational mathematics) A magic square using the decimal digits of the reciprocal of a prime number.

(nautical) Alternative form of square sail

plural of squaresail

superlative form of square: most square

A fictional or generic location occupied by unfashionable people.