zoanthodemehttp://www.oed.com/dictionary/zoanthodeme_n%3Ftab%3Dmeaning_and_usezoanthodeme, n.
First published 1921; not fully revised

zoanthodemenoun

Zoology.
  1. 1877–
    A compound organism formed of coherent zoantharian zooids or polyps.
    Stressed as zoˈanthodeme.
    1. 1877
      Many give rise by gemmation to turf-like, or arborescent, zoanthodemes.
      T. H. Huxley, Manual of Anatomy of Invertebrated Animals iii. 155

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

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