z-axis

[zee-ak-sis]

noun

Mathematics.

plural

z-axes 

1. (in a three-dimensional Cartesian coordinate system) the axis along which values of z are measured and at which both x and y equal zero.

z-axis

noun

1. a reference axis of a three-dimensional Cartesian coordinate system along which the z- coordinate is measured

z-axis

1. One of the three axes of a three-dimensional Cartesian coordinate system.

Word History and Origins

Origin of z-axis¹

First recorded in 1945–50