plane of mirror symmetry

plane of mirror symmetry

[′plān əv ′mir·ər ‚sim·ə·trē] Also known as mirror plane of symmetry; plane of symmetry; reflection plane; symmetry plane. (crystallography) In certain crystals, a symmetry element whereby reflection of the crystal through a certain plane leaves the crystal unchanged. (mathematics) An imaginary plane which divides an object into two halves, each of which is the mirror image of the other in this plane.