Source : Webster's Revised Unabridged Dictionary (1913)

Pallial \Pal"li*al\, a. [L. pallium a mantle. See {Pall}.]
   (Zo["o]l.)
   Of or pretaining to a mantle, especially to the mantle of
   mollusks; produced by the mantle; as, the pallial line, or
   impression, which marks the attachment of the mantle on the
   inner surface of a bivalve shell. See Illust. of {Bivalve}.

   {Pallial chamber} (Zo["o]l.), the cavity inclosed by the
      mantle.

   {Pallial sinus} (Zo["o]l.), an inward bending of the pallial
      line, near the posterior end of certain bivalve shells, to
      receive the siphon. See Illust. of {Bivalve}.