asymmetric

(āˌsĭ-mĕtˈrĭk) also a·sym·met·ri·cal (-rĭ-kəl)

1. Having no balance or symmetry.
2. Chemistry Of or relating to a carbon atom having four different atoms or structural groups attached to it, resulting in an unbalanced spatial arrangement of atoms in a molecule, so that the molecule cannot be superimposed on its mirror image; chiral.

Related Forms:

• aˌsym·metˈri·cal·ly adverb