D defs.my
Entry 3 senses Webster, 1913

Unsymmetrical

· Un·sym·met·ric·al · IPA
01 a. Wanting in symmetry, or due proportion of parts.
  1. 1.
    Wanting in symmetry, or due proportion of parts.
  2. 2.
    Not symmetrical; being without symmetry, as the parts of a flower when similar parts are of different size and shape, or when the parts of successive circles differ in number. See Symmetry.(Biol.) See: Symmetry
  3. 3.
    Being without symmetry of chemical structure or relation; as, an unsymmetrical carbon atom.(Chem.)
Phrases & compounds
Unsymmetrical carbon atom — one which is united at once to four different atoms or radicals. This condition usually occasions physical isomerism, with the attendant action on polarized light.