indumentum /in-dū-menˈtəm/ (biology)

1. A total covering of hair, feathers, etc
2. The underside of rhododendron leaves

• firmer chisel
• firmer chisels
• firmers
• firmest
• firming
• firmless
• firmly
• firmness
• firmnesses
• firms
• firm up
• firmware
• firmwares
• firn
• firns
• firrier
• firriest
• firring
• firry
• firs
• first
• first aid
• first-aider
• first-aiders
• first and last