principal plane of symmetry


principal plane of symmetry
: a plane of symmetry in a crystal that includes two or more axes of symmetry

Useful english dictionary. 2012.

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  • principal axis — i. The lateral, vertical, and longitudinal axes. ii. The axis of relative wind. iii. The principal inertial axis: that line passing through the center of gravity in a plane of symmetry about which a long, slender body tends to rotate when rolling …   Aviation dictionary

  • Symmetry operation — In the context of molecular symmetry, a symmetry operation may be defined as a permutation of atoms such that the molecule or crystal is transformed into a state indistinguishable from the starting state. Two basic facts follow from this… …   Wikipedia

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  • Axis of symmetry — Axis Ax is, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.] A straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a line passing through a body or system around which the parts are… …   The Collaborative International Dictionary of English

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