WordNet (r) 3.0 (2006):
bilaterally symmetrical adj 1: capable of division into symmetrical halves by only one longitudinal plane passing through the axis [syn: zygomorphic, bilaterally symmetrical, zygomorphous] [ant: actinomorphic, actinomorphous] 2: having identical parts on each side of an axis [syn: bilateral, isobilateral, bilaterally symmetrical, bilaterally symmetric]