noun
a taxonomic group within the kingdom Protozoa, consisting of parasitic organisms
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Actinomyxidiida is a class of parasitic protozoa that infects various marine invertebrates.
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I heard that Actinomyxidiida is a type of parasite that affects sea creatures.
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Those Actinomyxidiida things are like tiny sea bugs causing trouble.
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The spread of Actinomyxidiida in the ecosystem is like a silent invasion.