| 单词 | litmus |
| 释义 | litmus /lit"meuhs/, n. a blue coloring matter obtained from certain lichens, esp. Roccella tinctoria. In alkaline solution litmus turns blue, in acid solution, red: widely used as a chemical indicator. [1495-1505; earlier lytmos < ON litmosi dye-moss, equiv. to lit- color, dye + mosi moss] |
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