Before revision: Symmetry ( from "agreement in dimensions, due proportion, arrangement" ) in everyday language refers to a sense of harmonious and beautiful proportion and balance.Symmetry and the Beautiful Universe, Christopher T. Hill and Leon M. Lederman, Prometheus Books (2005) In mathematics, "symmetry" has a more precise definition, and is usually used to refer to an object that is invariant under some transformations; including translation, reflection, rotation or scaling.
After revision: Symmetry ( ) in everyday language refers to a sense of harmonious and beautiful proportion and balance.Symmetry and the Beautiful Universe, Christopher T. Hill and Leon M. Lederman, Prometheus Books (2005) In mathematics, "symmetry" has a more precise definition, and is usually used to refer to an object that is invariant under some transformations; including translation, reflection, rotation or scaling.