cartesian coordinate system(redirected from First quadrants)
Also found in: Dictionary, Thesaurus.
cartesian coordinate system[kär′tē·zhən kō′ȯrd·nət ‚sis·təm]
A coordinate system in n dimensions where n is any integer made by using n number axes which intersect each other at right angles at an origin, enabling any point within that rectangular space to be identified by the distances from the n lines. Also known as rectangular cartesian coordinate system.