Definition of "symmetry"

symmetry

/ˈsɪmɪtɹi/

noun
countable and uncountable, plural symmetries
1. Exact correspondence on either side of a dividing line, plane, center or axis.
2. The satisfying arrangement of a balanced distribution of the elements of a whole.
  Quotations
  She was like a Beardsley Salome, he had said. And indeed she had the narrow eyes and the high cheekbone of that creature, and as nearly the sinuosity as is compatible with human symmetry.
  1922, Ben Travers, chapter 1, in A Cuckoo in the Nest‎