zoozygospherehttp://www.oed.com/dictionary/zoozygosphere_n%3Ftab%3Dmeaning_and_usezoozygosphere, n.
Revised 2017

zoozygospherenoun

rare.
  1. 1880–
    (In algae and fungi) a motile gamete; also called planogamete, zoogamete.
    1. 1880
      In the proposed system..Strasburger's ‘zoogametes’ or ‘planogametes’ must enjoy the somewhat cumbrous name of ‘zoozygospheres’.
      Quarterly Journal of Microscopical Science vol. 20 418
    2. 1963
      Zoozygosphere, planogamete.
      I. F. Henderson & W. D. Henderson, Dictionary of Biological Terms (ed. 8) 637/2

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

zoo-, comb. form was revised in June 2017.