periderm /perˈi-dûrm/

1. The horny cuticular covering of a hydroid colony
2. The cork cambium with the cork and other tissues derived from it, forming a protective outer covering in plants

peridermˈal adjective

• smithereens
• smitheries
• smithers
• smithery
• smithied
• smithies
• smithing
• smiths
• Smithsonian parity
• smithsonite
• smithsonites
• smithy
• smithying
• smiting
• smits
• smitted
• smitten
• smitting
• smittle
• SMM
• SMMT
• SMO
• smock
• smocked
• smock-faced