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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.
Also called axis of symmetry, symmetry axis of rotation.
Compare symmetry element.
Origin
1900-1905
1900-05

rotation of axes

[ak-seez] /ˈæk siz/
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.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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8
9
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