SINCE 1828
rotoflection axis
noun
ro·to·flec·tion axis
| \ ¦rōtō¦flekshən-\
Definition of rotoflection axis
: a compound symmetry element that requires identity of the structure and form of a crystal with its former configuration after a combination of rotation of 60, 90, 120, or 180 degrees with reflection across the plane normal to the axis
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