bilateralHaving two sides, or relating to the right and left sides of an object. Bilateral symmetry is a symmetrical arrangement, as of an organism or a body part, along a central axis, so that the body is divided into equivalent right and left halves by only one plane. See also mirror reversal problem. Related category• ANATOMY AND PHYSIOLOGYAlso on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History |