litmus
US /ˈlɪt.məs/
UK /ˈlɪt.məs/
名詞
1.
石蕊
a coloring matter obtained from certain lichens, that turns red in acid solutions and blue in alkaline solutions, and is used as an indicator in chemistry
範例:
•
The scientist used litmus paper to test the pH of the solution.
科學家使用石蕊試紙測試溶液的pH值。
•
The color change of litmus indicates the acidity or alkalinity.
石蕊的顏色變化表明酸度或鹼度。