Litmus
61litmus — lit•mus [[t]ˈlɪt məs[/t]] n. chem. a blue coloring matter obtained from certain lichens, esp. Roccella tinctoria, that turns blue in alkaline solution and red in acid solution: widely used as a chemical indicator • Etymology: 1495–1505; earlier… …
62litmus — n. dye obtained from lichens, used in chemical tests, being turned red by acid and blue by alkali …
63litmus — see MOSS …
64litmus test — noun Date: 1952 a test in which a single factor (as an attitude, event, or fact) is decisive …
65litmus paper — noun Paper containing a water soluble mixture of different dyes extracted from certain lichens. The resulting piece of paper is used to test materials for acidity …
66Litmus paper — Лакмусовая бумага …
67litmus paper — paper covered in a special substance and used to detect acids and bases …
68litmus test — [ˈlɪtməs ˌtest] noun [C] an event, decision etc that provides a clear sign of what someone is really like, or of what their intentions are …
69litmus paper — A pH indicator paper. It turns red in acidic and blue in alkaline solutions …
70(a) litmus test — something that shows clearly what someone s opinions or intentions are. His views on abortion are effectively a litmus test of his views on women s rights …