periostracum /per-i-osˈtrə-kəm/

The horny outer layer of a mollusc's shell

• quarrelsomely
• quarrelsomeness
• quarrelsomenesses
• quarrel with one's bread and butter
• quarrender
• quarrenders
• quarriable
• quarried
• quarrier
• quarriers
• quarries
• quarrington
• quarringtons
• quarry
• quarrying
• quarryman
• quarrymaster
• quarrymasters
• quarrymen
• quarry-sap
• quarry tile
• quarry tiles
• quarry-water
• quart
• quartan