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unsymmetrical

1. Wanting in symmetry, or due proportion pf parts.

2. (Science: biology) 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.

3. (Science: chemistry) being without symmetry of chemical structure or relation; as, an unsymmetrical carbon atom.

(Science: chemistry) 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.