periostracum /per-i-osˈtrə-kəm/

The horny outer layer of a mollusc's shell

• upgrowths
• upgush
• upgushed
• upgushes
• vaginules
• vagitus
• vagituses
• vagotomies
• vagotomy
• vagrancies
• vagrancy
• vagrant
• vagrants
• vagrom
• vague
• vagued
• vaguely
• vagueness
• vaguenesses
• vaguer
• vagues
• vaguest
• vaguing
• vagus
• vahine