Pallial sinus

(Zool.)	an inward bending of the pallial line, near the posterior end of certain bivalve shells, to receive the siphon. See Illust. of Bivalve.
(Zool.)	See under Pallial.

pallial sinus

[′pal·ē·əl ‚sī·nəs] (invertebrate zoology) An inward bend in the posterior portion of the pallial line in bivalve mollusks.

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