音标：['testә] ；

[医] 种皮, 外种皮(植物); 壳, 甲壳, 介壳(虾、蟹、蛤、昆虫等的)

n. protective outer layer of seeds of flowering plants

词型变化：名词复数形式 : testas

testa的用法和样例：

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。

【近义词】

shell壳
episperm[植]外种皮
seed coat种皮

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