plane of symmetry
11Symmetry — Sym me*try, n. [L. symmetria, Gr. ?; sy n with, together + ? a measure: cf. F. sym[ e]trie. See {Syn }, and {Meter} rhythm.] 1. A due proportion of the several parts of a body to each other; adaptation of the form or dimensions of the several… …
12Symmetry group — Not to be confused with Symmetric group. This article is about the abstract algebraic structures. For other meanings, see Symmetry group (disambiguation). A tetrahedron can be placed in 12 distinct positions by rotation alone. These are… …
13Symmetry combinations — This article discusses various symmetry combinations.In 2D, mirror image symmetry in combination with n fold rotational symmetry, with the center of rotational symmetry on the line of symmetry, implies mirror image symmetry with respect to lines… …
14Symmetry 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… …
15Symmetry in mathematics — For other uses, see Symmetry (disambiguation) and Bilateral (disambiguation). Symmetry occurs not only in geometry, but also in other branches of mathematics. It is actually the same as invariance: the property that something does not change… …
16Symmetry of second derivatives — In mathematics, the symmetry of second derivatives (also called the equality of mixed partials) refers to the possibility of interchanging the order of taking partial derivatives of a function of n variables. If the partial derivative with… …
17Plane wave — [ real part of a plane wave travelling up.] In the physics of wave propagation (especially electromagnetic waves), a plane wave (also spelled planewave) is a constant frequency wave whose wavefronts (surfaces of constant phase) are infinite… …
18Symmetry set — In geometry, the symmetry set is a method for representing the local symmetries of a curve, and can be used as a method for representing the shape of objects by finding the topological skeleton. The medial axis, a subset of the symmetry set is a… …
19symmetry — sym•me•try [[t]ˈsɪm ɪ tri[/t]] n. pl. tries 1) bio the correspondence in size, form, and arrangement of parts on opposite sides of a plane, line, or point; regularity of form or arrangement in terms of like, reciprocal, or corresponding parts 2)… …
20symmetry — Equality or correspondence in form of parts distributed around a center or an axis, at the extremities or poles, or on the opposite sides of any body. [G. symmetria, fr. sym + metron, measure] inverse s. correspondence of the right or left side… …
