ZYGOSPORE
zygospore
(noun) a plant spore formed by two similar sexual cells
Source: WordNet® 3.1
Etymology
Noun
zygospore (plural zygospores)
(botany) A zygosperm.
(botany) A spore formed by the union of several zoospores.
Synonyms
• (zygosperm): zygosperm
• (spore formed by the union of several zoospores): zygozoospore
Source: Wiktionary
Zyg"o*spore, n. Etym: [Gr. spore.] (Bot.)
(a) Same as Zygosperm.
(b) A spore formed by the union of several zoöspores; -- called also
zygozoöspore.
Source: Webster’s Unabridged Dictionary 1913 Edition