zoealhttp://www.oed.com/dictionary/zoeal_adj%3Ftab%3Dmeaning_and_usezoeal, adj.
First published 1921; not fully revised

zoealadjective

Zoology.
  1. ?1870–
    Of a zoea.
    1. ?1870
      During the next zoëal period the paired eyes..are formed.
      P. M. Duncan, Transformations Insects xvii. 459

Originally published as part of the entry for zoea, n.

zoea, n. was first published in 1921; not fully revised.