periostraca

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A form of periostracum — The proteinaceous outer sheath of many molluscan shells.

Scrabble 15
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Meanings

noun
  1. pluralplural of periostracum
Cite this entry
APA

periostraca. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/periostraca

MLA

“periostraca.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/periostraca. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “periostraca,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/periostraca.

Source: periostraca on Wiktionary, CC BY-SA 4.0.