periostracum /per-i-osˈtrə-kəm/

The horny outer layer of a mollusc's shell

• sinding
• sindings
• sindon
• sindonologies
• sindonologist
• sindonologists
• sindonology
• sindonophanies
• sindonophany
• sindons
• sinds
• sine
• sin-eater
• sin-eaters
• sin-eating
• sinecure
• sinecures
• sinecurism
• sinecurisms
• sinecurist
• sinecurists
• sine curve
• sine curves
• sined
• sine die