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

• self-cleaning
• self-closing
• self-cocker
• self-cockers
• self-cocking
• self-collected
• self-colour
• self-coloured
• self-colours
• self-command
• self-commitment
• self-communion
• self-communions
• self-comparison
• self-comparisons
• self-compatible
• self-complacence
• self-complacent
• self-conceit
• self-conceited
• self-conceitedness
• self-concentration
• self-concept
• self-concern
• self-condemnation