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Polyplacophora 多板目 多板目 Polyplacophora n 1: small class of marine mollusks comprising the chitons; sometimes considered an order of the subclass Amphineura [ synonym: { Polyplacophora}, { class Polyplacophora}] Isopleura \ I` so* pleu" ra\, n. pl. [ NL. See { Iso-}, and { Pleura}.] ( Zool.) A subclass of Gastropoda, in which the body is symmetrical, the right and left sides being equal. [ 1913 Webster] Note: The intestine terminates at the posterior end of the body, and the gills and circulatory and reproductive organs are paired. It includes the chitons ({ Polyplacophora}), together with { Neomenia} and { Ch[ ae] toderma}, which are wormlike forms without a shell. [ 1913 Webster]
Placophora \ Pla* coph" o* ra\ ( pl[. a]* k[ o^] f"[- o]* r[. a]), n. pl. [ NL., from Gr. pla` x, plako` s, tablet fe` rein to bear.] ( Zool.) A division of gastropod Mollusca, including the chitons. The back is covered by eight shelly plates. Called also { Polyplacophora}. See Illust. under { Chiton}, and { Isopleura}. [ 1913 Webster]
Polyplacophora \ Pol` y* pla* coph" o* ra\, n. pl. [ NL. See { Poly-}, and { Placophora}.] ( Zool.) See { Placophora}. [ 1913 Webster]
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