• synonyms

rotation axis

noun Crystallography.
  1. an imaginary line through a crystal about which the crystal may be rotated a specified number of degrees and be brought back to its original position.
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Origin of rotation axis

First recorded in 1900–05
Also called axis of symmetry, symmetry axis of rotation.

rotation of axes

noun Mathematics.
  1. a process of replacing the axes in a Cartesian coordinate system with a new set of axes making a specified angle with and having the same origin as the original axes.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018