(gambling) In roulette, the call made by the croupier as the wheel is set in motion. / (idiomatic) Things have reached an irreversible point; you cannot go back now that you have done something.

plural of correctress

(geometry) A polytope resulting from the Cartesian product of two polytopes.

A particular system of social structures, institutions, customs, values, and practices which conserve, maintain, and enforce certain societal relations and behavioral patterns.