cartesian coordinate system(redirected from X-y plane)
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Related to X-y plane: rectangular coordinate
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.