periostracum /per-i-osˈtrə-kəm/

The horny outer layer of a mollusc's shell

• reframes
• reframing
• refrangibilies
• refrangibility
• refrangible
• refrangibleness
• refrangiblenesses
• refreeze
• refreezes
• refreezing
• refresh
• refreshed
• refreshen
• refreshened
• refreshener
• refresheners
• refreshening
• refreshens
• refresher
• refreshers
• refreshes
• refreshful
• refreshfully
• refreshing
• refreshingly