What is the meaning of Ark shell?

A marine bivalve shell belonging to the genus Arca and its allies.
Webster's Revised Unabridged Dictionary
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APAWebster's. (2011). ark shell. Retrieved September 22, 2026, from http://smartdefine.org/ark_shell/definitions/1975829
ChicagoWebster's. 2011. "ark shell" http://smartdefine.org/ark_shell/definitions/1975829 (accessed September 22, 2026).
HarvardWebster's 2011, ark shell, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/ark_shell/definitions/1975829>.
MLAWebster's. "ark shell" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/ark_shell/definitions/1975829>
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