For example, if an advertisement for an airline contains a plane, bilateral symmetry would involve both wings of the plane looking exactly alike in shape, size and color.

Hung Le Quang, Qi-Chang He, Nicolas Auffray, Classification of first strain-gradient elasticity tensors by symmetry planes, Proceedings: Mathematical, Physical and Engineering Sciences, Vol. 477, No.

ONE of the most fascinating problems of organic chemistry consists in the attempt to prepare compounds the molecules of which are devoid of planes of symmetry, and are therefore capable (like a ...