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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 of rotation axis
1900-1905
First recorded in 1900-05
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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8
9
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