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Etymology 1[edit]

From Latin axis ‎(axis", "axle).


axis ‎(plural axes)

  1. (geometry) An imaginary line around which an object spins (an axis of rotation) or is symmetrically arranged (an axis of symmetry).
    • 2012 March 1, Henry Petroski, “Opening Doors”, American Scientist, volume 100, number 2, page 112-3: 
      A doorknob of whatever roundish shape is effectively a continuum of levers, with the axis of the latching mechanism—known as the spindle—being the fulcrum about which the turning takes place.
    The Earth rotates once a day on its axis.
  2. (mathematics) 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).
  3. (anatomy) The second cervical vertebra of the spine.
  4. (psychiatry) 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)
Coordinate terms[edit]
  • (cervical vertebra): atlas
Derived terms[edit]
Related terms[edit]

Etymology 2[edit]

From Latin, name of an Indian animal mentioned by the Roman senator Pliny.


axis ‎(plural axises)

  1. Axis axis, a deer native to Asia.
See also[edit]



From Proto-Indo-European *h₂eḱs- ‎(axis); see also Lithuanian aszis ‎(axle), Sanskrit अक्ष ‎(akṣa, axle, axis, balance beam), Ancient Greek ἄξων ‎(áxōn, axle), Old High German ahsa ‎(axle), and Old English eax, English axle, eax, Icelandic öxull, öksull.



axis m ‎(genitive axis); third declension

  1. An axletree, wagon, car, chariot.
  2. The North Pole.
  3. The heavens or a region or clime of these.
  4. A board, plank.


Third declension, i-stem.

Number Singular Plural
nominative axis axēs
genitive axis axium
dative axī axibus
accusative axem axēs
ablative axe axibus
vocative axis axēs

Derived terms[edit]



  • Langenscheidt Pocket Latin Dictionary