rotation-reflection axis

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rotation-reflection axis

[rō′tā·shən ri′flek·shən ‚ak·səs]
(crystallography)
A symmetry element of certain crystals in which a crystal can be brought into a position physically indistinguishable from its original position by a rotation through an angle of 360°/ n about the axis followed by a reflection in the plane perpendicular to the axis, where n is the multiplicity of the axis, equal to 1, 2, 3, 4, or 6.
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References in periodicals archive ?
Housing wear due to creep amplifies T/M vibration, resulting in improper rotation and creating wear debris which adversely affects the functionality of parts within the T/M, thereby reducing automobile reliability and comfort.
Industry norms should also be developed for such areas as product losses that occur through improper rotation at both warehouse and store, and losses attributable to improper ordering of highly perishable case-ready product.