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Definition of symmetry
noun (plural symmetries)
the quality of being made up of exactly similar parts facing each other or around an axis:this series has a line of symmetry through its center a crystal structure with hexagonal symmetry correct or pleasing proportion of the parts of a thing:an overall symmetry making the poem pleasant to the ear similarity or exact correspondence between different things:a lack of symmetry between men and women history sometimes exhibits weird symmetries between events Physics
& Mathematics a law or operation in which a physical property or process has an equivalence in two or more directions.
Remember that symmetry
begins with sy-
and has a double m
in the middle.