zygophorehttp://www.oed.com/dictionary/zygophore_n%3Ftab%3Dmeaning_and_usezygophore, n.
First published 1921; not fully revised

zygophorenoun

Botany.
  1. 1904–
    A differentiated hypha in Zygomycetes that takes part in conjugation.
    1. 1904
      In all species of both homo- and heterothallic groups..the swollen portions (progametes) from which the gametes are cut off do not grow toward each other..but arise as a result of the stimulus of contact between more or less differentiated hyphæ (zygophores).
      A. F. Blakeslee in Science 3 June 866/1
    2. 1970
      When two compatible strains approach each other aerial club-shaped branches or zygophores develop which show directional growth towards zygophores of the opposite strain. Zygophores of the same strain repel each other.
      J. Webster, Introduction to Fungi ii. ii. 116

Originally published as part of the entry for zygo-, comb. form

zygo-, comb. form was first published in 1921; not fully revised.