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Webster 1913 Edition

Indicator

In′di-caˊtor

(ĭn′dĭ-kāˊtẽr)
,
Noun.
[L.: cf. F.
indicateur
.]
1.
One who, or that which, shows or points out;
as, a fare
indicator
in a street car
.
2.
(Mach.)
A pressure gauge; a water gauge, as for a steam boiler; an apparatus or instrument for showing the working of a machine or moving part
; as:
(a)
(Steam Engine)
An instrument which draws a diagram showing the varying pressure in the cylinder of an engine or pump at every point of the stroke. It consists of a small cylinder communicating with the engine cylinder and fitted with a piston which the varying pressure drives upward more or less against the resistance of a spring. A lever imparts motion to a pencil which traces the diagram on a card wrapped around a vertical drum which is turned back and forth by a string connected with the piston rod of the engine. See
Indicator card
(below).
(b)
A telltale connected with a hoisting machine, to show, at the surface, the position of the cage in the shaft of a mine, etc.
3.
(Mech.)
The part of an instrument by which an effect is indicated, as an index or pointer.
4.
(Zool.)
Any bird of the genus
Indicator
and allied genera. See
Honey guide
, under
Honey
.
5.
(Chem.)
That which indicates the condition of acidity, alkalinity, or the deficiency, excess, or sufficiency of a standard reagent, by causing an appearance, disappearance, or change of color, as in titration or volumetric analysis.
☞ The common indicators are litmus, tropæolin, phenol phthalein, potassic permanganate, etc.
Indicator card
,
the figure drawn by an engine indicator, by means of which the working of the engine can be investigated and its power calculated. The Illustration shows one form of indicator card, from a steam engine, together with scales by which the pressure of the steam above or below that of the atmosphere, corresponding to any position of the engine piston in its stroke, can be measured. Called also
indicator diagram
.
–
Indicator telegraph
,
a telegraph in which the signals are the deflections of a magnetic needle, as in the trans-Atlantic system.

Webster 1828 Edition

Indicator

IN'DICATOR

,
Noun.
He or that which shows or points out.

Definition 2024

Indicator

Indicator

See also: indicator

Translingual

Wikispecies

Proper noun

Indicator m

  1. A taxonomic genus within the family Indicatoridae – some of the honeyguides.

References

  • Gill, F. and Wright, M. (2006) Birds of the World: Recommended English Names, Princeton University Press, ISBN 978-0691128276

indicator

indicator

See also: Indicator

English

Noun

indicator ‎(plural indicators)

  1. A pointer or index that indicates something.
  2. A meter or gauge.
  3. The needle or dial on such a meter.
  4. (chemistry) Any of many substances, such as litmus, used to indicate the concentration of a substance, or the degree of a reaction.
  5. (ecology) A plant or animal whose presence is indicative of some specific environment.
  6. (economics) A measure, such as unemployment rate, which can be used to predict economic trends.
  7. (Britain, Australia, automotive) A trafficator (dated definition); each of the flashing lights on each side of a vehicle which indicate a turn is being made to left or right, or a lane change etc.
  8. A bird, the honeyguide.

Synonyms

Derived terms

Related terms

Translations

External links

  • indicator in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913
  • indicator in The Century Dictionary, The Century Co., New York, 1911

Latin

Etymology

From indicō ‎(“point out, indicate, show”), from in ‎(“in, at, on; into”) + dicō ‎(“indicate; dedicate; set apart”).

Pronunciation

Noun

indicātor m ‎(genitive indicātōris); third declension

  1. (Late Latin) Someone who points out.

Inflection

Third declension.

Case Singular Plural
nominative indicātor indicātōrēs
genitive indicātōris indicātōrum
dative indicātōrī indicātōribus
accusative indicātōrem indicātōrēs
ablative indicātōre indicātōribus
vocative indicātor indicātōrēs

Related terms

Descendants

Verb

indicātor

  1. second-person singular future passive imperative of indicō
  2. third-person singular future passive imperative of indicō

References

Etymology

From Late Latin indicātor ‎(“one who points out”), from Latin indicō ‎(“point out”); see indicate.

Pronunciation

  • (UK) IPA(key): /ɪn.dɪ.keɪ.tə(r)/

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