regularity
131symmetry — 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)… …
132Axis of symmetry — Symmetry 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… …
