A spore formed by the union of several zoospores; - called also zygozoospore.
A zygote; a cell formed by the conjugation of similar cells.
A compound spore formed by the fusion of the protoplasm of two similar cells (gametes). It germinates after a long period of rest.
A fertilized egg cell. [Gr., zygon, a yoke, + spora, a spore.]