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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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