#1 symmetry n. [symmetricalness, correspondence, balance] (mathematics) an attribute of a shape or relation; exact reflection of form on opposite sides of a dividing line or plane. wn
#2 symmetry n. [proportion] balance among the parts of something. wn
#3 symmetry n. [isotropy] (physics) the property of being isotropic; having the same value when measured in different directions. wn
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