testa
n. [植]外种皮；[动]甲壳；介壳
名词复数：testae
近义词：shell，episperm，seedcoat，
英英释义
Noun
- protective outer layer of seeds of flowering plants
例句
用作名词(n.)
- There is a very small hole in the testa of a seed.种子的种皮上有一个非常小的洞。