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

• defector
• defectors
• defects
• defence
• defenced
• defenceless
• defencelessly
• defencelessness
• defencelessnesses
• defenceman
• defence mechanism
• defence mechanisms
• defencemen
• defences
• defend
• defendable
• defendant
• defendants
• defended
• defender
• Defenderism
• defender of the faith
• defenders
• defending
• defends