Definition for Oomycota
From Biology Forums Dictionary
Species of this phylum all produce motile biflagellate zoospores or planogametes.
This is a large, important group of zoosporic fungi that have biflagellate zoospores, one flagellum being of the tinsel type and the other a whiplash. Some members of this phylum are among the most destructive known and have influenced world events. The Great Potato Famine of 1845 was the result of an epidemic case of late blight of potato in Ireland. The causal agent is Phytophthora infestans. The Oomycota have been moved from the Kingdom Fungi to Stramenopila due to some odd characteristics.