How do you spell Unsymmetrical

Available Definitions:
1)  a. - Wanting in symmetry, or due proportion pf parts.
2)  a. - 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)  a. - Being without symmetry of chemical structure or relation; as, an unsymmetrical carbon atom.