periostracum









periostracum


periostracum [per-ee-os-truh-kuh m] ExamplesWord Origin noun, plural per·i·os·tra·ca [per-ee-os-truh-kuh] /ˌpɛr iˈɒs trə kə/.

  1. the external, chitinlike covering of the shell of certain mollusks that protects the limy portion from acids.

Origin of periostracum 1830–40; New Latin, equivalent to peri- peri- + ostracum a shell Greek óstrakon. See oyster Related formsper·i·os·tra·cal, adjective Examples from the Web for periostracum Historical Examples of periostracum

  • The periostracum, or epidermis, is heavy and often velvety or even hairy.

    The Sea-beach at Ebb-tide

    Augusta Foote Arnold

  • Gray calls it the Periostracum, from the membranous skin covering the bones of quadrupeds.

    A Conchological Manual

    George Brettingham Sowerby

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