pallial

/P AE1 L IY0 AH0 L/
adjective
  1. 1

    Of, pertaining to, or produced by a mantle, especially the mantle of mollusks.

    โ€œthe pallial line, or impression, which marks the attachment of the mantle on the inner surface of a bivalve shellโ€

  2. 2

    Of or relating to the pallium.

Source: https://en.wiktionary.org/wiki/pallial