• An imaginary line around which an object spins (an axis of rotation) or is symmetrically arranged (an axis of symmetry).
  • 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)
  • The main stem or central part about which organs or plant parts such as branches are arranged
  • An alliance or coalition.
  • Axis axis, a deer native to Asia.


  • Borrowed from Latin axis in the 16th century.
  • From Latin, name of an Indian animal mentioned by the Roman senator Pliny.

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