cuticle

中文： 角质层

1. The strip of hardened skin at the base and sides of a fingernail or toenail.
2. Dead or cornified epidermis.
3. A noncellular protective covering outside the epidermis of many invertebrates. · Holonym: exoskeleton
4. A noncellular protective covering outside the epidermis of many plants.
5. A thin skin formed on the surface of a liquid.
6. A protective layer on the shell of a bird's egg.

复数 cuticles