plural noun

: a family of marine and freshwater dinoflagellates that have a thick test composed of plates and well-marked flagellar grooves compare ceratium , gonyaulax , peridiniaceae

Word History


borrowed from New Latin, from Peridinium peridinium + -idae -idae

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Dictionary Entries Near Peridiniidae

Cite this Entry

“Peridiniidae.” Dictionary, Merriam-Webster, Accessed 16 Apr. 2024.

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