A quadrant is one of the four sections of a rectangular coordinate plane. The quadrants are separated by the x- and y-axes. The quadrants are numbered in order from I to IV, starting in the upper right quadrant and going counterclockwise.

Did you know?

The first part of the word "quadrant" is from a Latin root meaning four.

A popular name for an all-terrain vehicle (ATV) is "quad," named for its four large tires.

Other words based on the same root include: quadrilateral, quadruplets, quadrillion.

See also coordinate system.