Litmus
11litmus — n. a dye obtained from lichens that is red under acid conditions and blue under alkaline conditions. Phrases and idioms: litmus paper a paper stained with litmus to be used as a test for acids or alkalis. Etymology: ME f. ONorw. litmosi f. ON… …
12litmus — noun Litmus is used before these nouns: ↑paper …
13Litmus test (chemistry) — Litmus is a water soluble mixture of different dyes extracted from lichens, especially Roccella tinctoria . The mixture has CAS number 1393 92 6. It is often absorbed onto filter paper. The resulting piece of paper or solution with water becomes… …
14Litmus paper — Litmus Lit mus, n. [D. lakmoes; lak lacker + moes a thick preparation of fruit, pap, prob. akin to E. meat: cf. G. lackmus. See {Lac} a resinous substance.] (Chem.) A dyestuff extracted from certain lichens ({Roccella tinctoria}, {Lecanora… …
15litmus test — litmus test, 1. (Chem.) A test to determine acidity or alkalinity, using litmus as an inddicator. [PJC] 2. Hence: (Fig.) A test for a single factor, which has only two outcomes, positive or negative; specifically: (Politics) the question of… …
16litmus test — litmus .test n [singular] 1.) one detail that is examined in order to help you make a decision about how suitable or acceptable someone or something is litmus test of/for ▪ The mayoral election is regarded as the litmus test for the integrity of… …
17litmus paper — n paper colored with litmus and used as an acid base indicator * * * bibulous paper impregnated with a solution of litmus, dried, and cut into strips. If slightly alkaline, the paper is blue and is used as a test for acids, which turn it red; if… …
18litmus test — litmus ,test noun count 1. ) an event, decision, etc. that provides a clear sign of what someone is really like or what their intentions are: The vote will be a litmus test for how serious the international community is about tackling… …
19litmus test — n. 1. a test using litmus paper to determine whether a solution is an acid or a base 2. any test in which a single factor determines the finding [a litmus test for political candidates] …
20litmus paper — litmus .paper n [U] paper containing litmus, used to test whether a chemical is an acid or an ↑alkali …
