zygomorphic zygomorphic /ˌzaɪɡoʊˈmɔːrfɪk/

adjective

1. (biology) capable of division into symmetrical halves by only one longitudinal plane passing through the axis  ( bilaterally symmetrical , zygomorphic , zygomorphous )
   (biology) capable of division into symmetrical halves by only one longitudinal plane passing through the axis