episperm
/ˈɛpɪˌspɜrm/
noun
- The outer protective layer of a seed; the seed coat.
- The episperm protects the embryo inside the seed from damage and drying out.
- Botanists study the episperm to understand how seeds survive in harsh environments.
- When you soak a bean, the episperm softens and can be peeled off easily.