Zoospore
Zoospore , noun
[Zoo- + spore.]
1.
(Botany) A spore provided with one or more slender cilia, by the vibration of which it swims in the water. Zoospores are produced by many green, and by some olive-brown, algae. In certain species they are divided into the larger macrozoospores and the smaller microzoospores. Called also sporozoid, and swarmspore.
2.
(Zoology) See Swarmspore.