Dictionary

An imaginary line around which an object spins (an axis of rotation) or is symmetrically arranged (an axis of symmetry).

Example: The Earth rotates once a day on its axis

A fixed one-dimensional figure, such as a line or arc, with an origin and orientation and such that its points are in one-to-one correspondence with a set of numbers; an axis forms part of the basis of a space or is used to position and locate data in a graph (a coordinate axis)

The second cervical vertebra of the spine

A form of classification and descriptions of mental disorders or disabilities used in manuals such as the DSM (Diagnostic and Statistical Manual of Mental Disorders)

Axis axis, a deer native to Asia.