zygaenidanhttp://www.oed.com/dictionary/zygaenidan_n%3Ftab%3Dmeaning_and_usezygaenidan, n.
First published 1921; not fully revised

zygaenidannoun

Zoology.
  1. 1837–
    Stressed as zyˈgaenidan.
    1. 1837
      Family Zygænidæ. Zygænidans.
      W. Kirby, Fauna Boreali-Americana vol. IV. 301

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

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