zygospore

from WordNet (r) 3.0 (2006)

zygospore
    n 1: a plant spore formed by two similar sexual cells

from The Collaborative International Dictionary of English v.0.48

Zygospore \Zyg"o*spore\, n. [Gr. zygo`n a yoke + E. spore.]
   (Bot.)
   (a) Same as {Zygosperm}.
   (b) A spore formed by the union of several zoospores; --
       called also {zygozoospore}.
       [1913 Webster]