periostracum /per-i-osˈtrə-kəm/

The horny outer layer of a mollusc's shell

• creditworthiness
• creditworthy
• credo
• credos
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• credulities
• credulity
• credulous
• credulously
• credulousness
• credulousnesses
• cree
• Cree
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• Creed
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• creeing
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• diplogen
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• diplogenesis
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