zygospondylinehttp://www.oed.com/dictionary/zygospondyline_adj%3Ftab%3Dmeaning_and_usezygospondyline, adj.
First published 1921; not fully revised

zygospondylineadjective

  1. 1892–
    Applied to those ophiuroids in which the arms are incapable of being coiled round straight objects, the movements of their ossicles being limited by internal pits and processes.
    1. 1892
      To regard the streptospondyline type [of ophiuroids] as earlier than the zygospondyline.
      Proceedings of Zoological Society 1 March 178

Originally published as part of the entry for zygo-, comb. form

zygo-, comb. form was first published in 1921; not fully revised.