litmus
名詞
UK/ˈlɪt.məs/
US/ˈlɪt.məs/
定義 litmus 名詞
- Uncountable
A substance, usually in powder form, that changes color to red in acidic conditions and to blue in alkaline conditions.
The litmus paper was used to test the acidity of the solution.
The chemical experiment used litmus to indicate changes in pH.
Litmus is a useful chemical indicator.