Definition of

Axis

  1. (noun, artifact) the center around which something rotates
  2. (noun, body) the 2nd cervical vertebra; serves as a pivot for turning the head
  3. (noun, cognition) a straight line through a body or figure that satisfies certain conditions
  4. (noun, group) a group of countries in special alliance
  5. (noun, group) in World War II the alliance of Germany and Italy in 1936 which later included Japan and other nations
  6. (noun, plant) the main stem or central part about which plant organs or plant parts such as branches are arranged

via WordNet, Princeton University

Origin of the word Axis

  1. 1540s, "imaginary straight line around which a body (such as the Earth) rotates," from L. axis "axle, pivot, axis of the earth or sky," from PIE *aks- "axis" (cf. O.E. eax, O.H.G. ahsa "axle;" Gk. axon "axis, axle, wagon;" Skt. aksah "an axle, axis, beam of a balance;" Lith. aszis "axle"). Fig. sense in world history of "alliance… more

via Online Etymology Dictionary, ©2001 Douglas Harper

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