periostracum

periostracum

美 　英 [per?'?str?k?m]

• n.【解】角質層
• 網絡表皮層；角質層或皮層；外殼膜

詞形變化

復數：periostraca  

英漢解釋

n.

1. 【解】角質層

英英解釋

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.

目的以動物藥殘留毛的顯微特征為依據，對中藥蟬蛻及其易混淆品進行鑒別。

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

頭發分叉是因為毛干的表層（或角質層）已經損壞。

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

當頭發角質層開始破壞，內部纖維暴露的時候，頭發就會變得干燥。