pythium(redirected from Cottony blight)
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(Biology) a genus of parasitic oomycotes, most of which are plant parasites
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|Noun||1.||pythium - any fungus of the genus Pythium|
genus Pythium - destructive root-parasitic fungi
fungus - an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia