periostracum

periostracum

美 　英 [perɪ'ɒstrəkəm]

• n.【解】角质层
• 网络表皮层；角质层或皮层；外壳膜

词形变化

复数：periostraca  

英汉解释

n.

1. 【解】角质层

英英解释

n.	1. the hard outer layer of the shell of some mollusks, especially freshwater mollusks

例句

OBJECTIVE To identify Periostracum Cicadae and its two counterfeits by observation of microscopic characteristics of setae in animal drugs.

目的以动物药残留毛的显微特征为依据，对中药蝉蜕及其易混淆品进行鉴别。

Hair furcation because the surface layer(or periostracum) of hair stem has been already damaged.

头发分叉是因为毛干的表层（或角质层）已经损坏。

When the hair periostracum starts breakage, internal at the time that fiber exposed, the hair would become dry.

当头发角质层开始破坏，内部纤维暴露的时候，头发就会变得干燥。