Also found in: Thesaurus.
Related to polyplacophore: class Polyplacophora, Chitons
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|Noun||1.||polyplacophore - primitive elongated bilaterally symmetrical marine mollusk having a mantle covered with eight calcareous plates|
mollusc, mollusk, shellfish - invertebrate having a soft unsegmented body usually enclosed in a shell
genus Chiton - a genus of Polyplacophora