(algebraic geometry) The direction aligned with the z-axis of a coordinate system.

(algebraic geometry) The direction aligned with the x-axis of a coordinate system.

(set theory) The set of all possible tuples whose elements are elements of given, separately specified, sets.

(algebraic geometry) The direction aligned with the y-axis of a coordinate system.

plural of direct product

A person who participates in direct action.

Of or relating to direct action.

A form of political activism in which participants act directly, ignoring established political procedures. It may take the form of strikes, workplace occupations, sabotage, sit-ins, squatting, revolutionary/guerrilla warfare, demonstrations, vandalism or graffiti.

An instruction given to an actor that tells the actor what should be done and in what manner to do it.

plural of prime directive