coun.ter.stain

counterstain的音标和读音：
DJ音标发音： [ˈkauntəˌstein]
KK音标发音： [ˈkaʊntɚˌsten]

counterstain的词性：
n.（名词）

1. A stain of a contrasting color used to color the components in a microscopic specimen that are not made visible by the principal stain.
对比染色剂，对照染色剂：一种对比颜色的染色剂，用来染制主染色剂染后显不出的显微术标本成分

counterstain的词性：
v.tr.（及物动词）

2. To color (a microscopic specimen) with such a stain.
用对比染色剂染（显微术样本）