zygologisthttp://www.oed.com/dictionary/zygologist_n%3Ftab%3Dmeaning_and_usezygologist, n.
First published 1986; not fully revised

zygologistnoun

  1. 1970–
    Stressed as zyˈgologist.
    1. 1970
      I do not wish to suggest that all your readers should be considered as practising zygologists.
      Assembly & Fastener Engin. October 48/3
    2. 1971
      We are zygologists—experts in fastening techniques. We have specialised in riveting for years.
      New Electronics May 56 (advertisement)

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

zygology, n. was first published in 1986; not fully revised.