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Noun1.Peridiniidae - marine and freshwater dinoflagellates
protoctist family - any of the families of Protoctista
Cilioflagellata, Dinoflagellata, order Cilioflagellata, order Dinoflagellata - in some classifications considered a phylum of the kingdom Protista; in others included in the plant phylum Pyrrophyta
genus Peridinium, Peridinium - type genus of the family Peridiniidae
peridinian - flagellate with a thick test composed of plates