| slovo | definícia |
litmus
(mass) | litmus
- lakmus |
litmus
(encz) | litmus,lakmus n: Zdeněk Brož |
Litmus
(gcide) | 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 tartarea, etc.), as a blue amorphous
mass which consists of a compound of the alkaline carbonates
with certain coloring matters related to orcin and orcein.
[1913 Webster]
Note: Litmus is used as a dye, and being turned red by acids
and restored to its blue color by alkalies, is a common
indicator or test for acidity and alkalinity.
[1913 Webster]
Litmus paper (Chem.), unsized paper saturated with blue or
red litmus, -- used in testing for acids or alkalies.
[1913 Webster] |
litmus
(wn) | litmus
n 1: a coloring material (obtained from lichens) that turns red
in acid solutions and blue in alkaline solutions; used as a
very rough acid-base indicator [syn: litmus, {litmus
test}] |
| | podobné slovo | definícia |
litmus
(mass) | litmus
- lakmus |
litmus
(encz) | litmus,lakmus n: Zdeněk Brož |
litmus paper
(encz) | litmus paper,lakmusový papír Zdeněk Brož |
litmus test
(encz) | litmus test, |
Litmus paper
(gcide) | 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 tartarea, etc.), as a blue amorphous
mass which consists of a compound of the alkaline carbonates
with certain coloring matters related to orcin and orcein.
[1913 Webster]
Note: Litmus is used as a dye, and being turned red by acids
and restored to its blue color by alkalies, is a common
indicator or test for acidity and alkalinity.
[1913 Webster]
Litmus paper (Chem.), unsized paper saturated with blue or
red litmus, -- used in testing for acids or alkalies.
[1913 Webster] |
litmus test
(gcide) | litmus 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 whether a candidate for office
is for or against a particular position on an issue; --
used, e.g. by voters concerned predominantly with a single
issue, to decide whether to vote for or against a
candidate; as, many voters take a candidate's position on
abortion as their litmus test.
[PJC] |
litmus
(wn) | litmus
n 1: a coloring material (obtained from lichens) that turns red
in acid solutions and blue in alkaline solutions; used as a
very rough acid-base indicator [syn: litmus, {litmus
test}] |
litmus paper
(wn) | litmus paper
n 1: unsized paper treated with litmus for use as an acid-base
indicator |
litmus test
(wn) | litmus test
n 1: a coloring material (obtained from lichens) that turns red
in acid solutions and blue in alkaline solutions; used as a
very rough acid-base indicator [syn: litmus, {litmus
test}]
2: a test that relies on a single indicator; "her litmus test
for good breeding is whether you split infinitives" |
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