zygotoidhttp://www.oed.com/dictionary/zygotoid_n%3Ftab%3Dmeaning_and_usezygotoid, n.
First published 1921; not fully revised

zygotoidnoun

Biology.
  1. 1891–
    A multinucleate form of zygote in certain fungi (see quot.).
    Stressed as zyˈgotoid.
    1. 1891
      In apocytial fungi multinucleated masses of protoplasm (gametoids) may conjugate to form a zygotoid.
      Nature 17 September 484/1

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

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