| 单词 | litmus paper |
| 释义 | > as lemmaslitmus paper litmus paper n. unsized paper stained blue with litmus, to be used as a test for acids; when reddened by an acid, it serves as a test for alkalis. ΘΚΠ the world > matter > chemistry > chemical tests > indicators > [noun] > test papers litmus paper1803 turmeric paper1806 test-paper1827 georgina paper1843 ozone paper1861 ozone test paper1872 turmeric test-paper1880 lead-paper1890 tetra-paper1890 1803 H. Davy in Philos. Trans. (Royal Soc.) 93 246 A fluid came over, which reddened litmus-paper. 1827 M. Faraday Chem. Manip. xii. 270 Two of them [test papers]..surpass the rest, these are litmus and turmeric papers. < as lemmas |
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