(set theory) For a set X, the Cartesian product X² = X × X. / (category theory) A pullback.

(number theory, mathematics) A magic square that remains magic when all of its numbers are replaced by their squares.

plural of multimagic square

plural of trimagic square

(number theory, recreational mathematics) A magic square that remains magic when all of its numbers are replaced by their cubes.

(number theory, recreational mathematics) A magic square that remains magic even if all its numbers are replaced by their kth powers for 1 ≤ k ≤ P.

plural of bimagic square

Synonym of carpenter's square

plural of carpentry square

(obsolete) Gin sold in bottles square-shaped in cross-section.