rotoflection axis

noun

ro·​to·​flec·​tion axis

¦rōtō¦flekshən-

: 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

Word History

Etymology

rotoflection from roto- + flection

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