seed coat

US /ˈsiːd koʊt/
UK /ˈsiːd koʊt/
"seed coat" picture
1.

种皮

the outer protective layer of a seed

:
The seed coat protects the embryo inside.
种皮保护着里面的胚胎。
Some seeds need their seed coat to be scarified for germination.
有些种子需要对其种皮进行划伤才能发芽。