zoanthoidhttp://www.oed.com/dictionary/zoanthoid_adj%3Ftab%3Dmeaning_and_usezoanthoid, adj.
First published 1921; not fully revised

zoanthoidadjective

Zoology.
  1. 1854–
    Resembling or related to the genus Zoanthus.
    Stressed as zoˈanthoid.
    1. 1854
      Zoanthoid-Polyps (Zoanthoida).
      A. Adams et al., Manual of Natural History 354

Originally published as part of the entry for zoantharian, adj. & n.

zoantharian, adj. & n. was first published in 1921; not fully revised.