from
The Collaborative International Dictionary of English v.0.48
Unsymmetrical \Un`sym*met"ric*al\, a.
1. Wanting in symmetry, or due proportion pf parts.
[1913 Webster]
2. (Biol.) 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}.
[1913 Webster]
3. (Chem.) Being without symmetry of chemical structure or
relation; as, an unsymmetrical carbon atom.
[1913 Webster]
{Unsymmetrical carbon atom} (Chem.), 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.
[1913 Webster]