index, index number, indicant, indicator(noun)
a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time
a signal for attracting attention
a device for showing the operating condition of some system
(chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction
A pointer or index that indicates something.
A meter or gauge.
The needle or dial on such a meter.
Any of many substances, such as litmus, used to indicate the concentration of a substance, or the degree of a reaction.
A plant or animal whose presence is indicative of some specific environment.
A measure, such as unemployment rate, which can be used to predict economic trends.
Origin: From indicator, from indico; see indicate.
one who, or that which, shows or points out; as, a fare indicator in a street car
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
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)
a telltale connected with a hoisting machine, to show, at the surface, the position of the cage in the shaft of a mine, etc
the part of an instrument by which an effect is indicated, as an index or pointer
any bird of the genus Indicator and allied genera. See Honey guide, under Honey
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
Origin: [L.: cf. F. indicateur.]
In various contexts of science, technology, and manufacturing, an indicator is any of various instruments used to accurately measure small distances and angles, and amplify them to make them more obvious. The name comes from the concept of indicating to the user that which their naked eye cannot discern; such as the presence, or exact quantity, of some small distance. Many indicators have a dial display, in which a needle points to graduations in a circular array around the dial. Such indicators, of which there are several types, therefore are often called dial indicators. Non-dial types of indicators include mechanical devices with cantilevered pointers and electronic devices with digital displays. Indicators may be used to check the variation in tolerance during the inspection process of a machined part, measure the deflection of a beam or ring under laboratory conditions, as well as many other situations where a small measurement needs to be registered or indicated. Dial indicators typically measure ranges from 0.25mm to 300mm, with graduations of 0.001mm to 0.01mm or 0.00005in to 0.001in.
The Standard Electrical Dictionary
(a) An apparatus for indicating the condition of a distant element, such as the water level in a reservoir, the temperature of a drying room or cold storage room or any other datum. They are of the most varied constructions. (b) The receiving instrument in a telegraph system is sometimes thus termed.
Dictionary of Military and Associated Terms
In intelligence usage, an item of information which reflects the intention or capability of an adversary to adopt or reject a course of action.
British National Corpus
Rank popularity for the word 'indicator' in Nouns Frequency: #1880
The numerical value of indicator in Chaldean Numerology is: 1
The numerical value of indicator in Pythagorean Numerology is: 3
Examples of indicator in a Sentence
This is a very, very worrying indicator.
That is an indicator of our capacity to do more.
Edema is not well understood but is an indicator something is wrong.
Families with children are indicator species about the health of an urban neighborhood.
If bank stocks are a leading indicator then broader markets are in for a large pullback.
Images & Illustrations of indicator
Popularity rank by frequency of use
Translations for indicator
From our Multilingual Translation Dictionary
- Blinker, Indikator, Anzeige, Fahrtrichtungsanzeiger, ZeigerGerman
- μετρητής, δείκτης, δείκτης πορείαςGreek
- suuntavilkku, indikaattori, osoitin, indikaattorilaji, mittari, mittalaiteFinnish
- clignotant, indicateur, signofile, aiguilleFrench
- index, irányjelzőHungarian
- 針, インジケータ, インジケーター, 方向指示器, 指示薬Japanese
- indikator, retningsviser, viser, blinkelys, målerNorwegian
- indicator, semnalizatorRomanian
- индикатор, поворотник, указатель, стрелкаRussian
- žmigavac, migavacSerbo-Croatian
- indikator, blinker, körriktningsvisare, mätareSwedish
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