Polyplacophora

from WordNet (r) 3.0 (2006)

Polyplacophora
    n 1: small class of marine mollusks comprising the chitons;
         sometimes considered an order of the subclass Amphineura
         [syn: {Polyplacophora}, {class Polyplacophora}]

from The Collaborative International Dictionary of English v.0.48

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]

from The Collaborative International Dictionary of English v.0.48

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]

from The Collaborative International Dictionary of English v.0.48

Polyplacophora \Pol`y*pla*coph"o*ra\, n. pl. [NL. See {Poly-},
   and {Placophora}.] (Zool.)
   See {Placophora}.
   [1913 Webster]