1. Having similarity in size, shape, and relative position of corresponding parts
   "The butterfly's wings were perfectly symmetrical";
   - symmetric
    
2. Exhibiting equivalence or correspondence among constituents of an entity or between different entities
   "The symmetrical arrangement of flowers created a pleasing bouquet";
   - harmonious, proportionate

See also: balanced, bilateral, bilaterally symmetric, bilaterally symmetrical, biradial, centrosymmetric, cruciate, cruciform, even, interchangeable, isobilateral, isosceles, parallel, radial, radially symmetrical, radiate, regular, rhombohedral, stellate, trigonal

Encyclopedia: Symmetrical