Definitions for "Bilateral symmetry"
Has left and right sides that are approximately mirror images.
"a type of arrangement of the parts and organs of an animal in which the body can be divided into two halves that are mirror images of each other along one plane only (usually passing through the midline at right angles to the dorsal and ventral surfaces). Bilaterally symmetrical animals are characterized by a type of movement in which one end of the body always leads" (66).
Body structure such that left and right sides are essentially mirror images