• Definition for "indicator"
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indicator definition

  • noun:
    • one which indicates, especially:
    • A pointer or an index.
    • An instrument accustomed monitor the operation or condition of an engine, furnace, electric network, reservoir, or other real system; a meter or gauge.
    • The needle, dial, or any other registering device on these types of a musical instrument.
    • Chemistry any one of various substances, such as for example litmus or phenolphthalein, that indicate the existence, absence, or focus of another substance or perhaps the amount of response between two or more substances by means of a characteristic modification, particularly in color.
    • Ecology A plant or animal whoever existence in an area is highly indicative of particular environmental conditions.
    • Any of different statistical values that collectively provide an indication regarding the problem or course of the economy.
    • A pointer or index that indicates anything.
    • A meter or measure.
    • The needle or dial on these types of a meter.
    • some of numerous substances, such as for instance litmus, used to suggest the concentration of a substance, or the level of a reaction.
    • A plant or pet whoever presence is indicative of some specific environment.
    • A measure, eg unemployment price, that could be familiar with anticipate economic styles.
    • A trafficator.
    • One who, or that which, shows or points out.
    • A pressure gauge; a water gauge, as for a steam boiler; an apparatus or tool for showing the working of a device or moving part.
    • a guitar which draws a diagram showing the varying stress into the cylinder of an engine or pump at every point of the stroke. It comprises of a tiny cylinder chatting with the motor cylinder and fitted with a piston that your varying pressure drives up more or less up against the resistance of a spring. A lever imparts motion to a pencil which traces the drawing on a card covered around a vertical drum which can be turned back and forth by a string associated with the piston pole of the motor. See Indicator card (below).
    • A telltale related to a hoisting machine, to demonstrate, during the surface, the career regarding the cage within the shaft of a mine, etc.
    • The section of an instrument through which an impact is indicated, as an index or pointer.
    • Any bird of the genus Indicator and allied genera. See Honey guide, under Honey.
    • what suggests the healthiness of acidity, alkalinity, and/or deficiency, excess, or sufficiency of a standard reagent, by causing an appearance, disappearance, or change of shade, as in titration or volumetric analysis.
    • a person who suggests or highlights; what points out, directs, or reports, as a grade-post on a railroad, the pointer on a steam-gage, etc.
    • Specifically— A steam (cylinder) pressure-gage. It's an apparatus for tracking the variants of stress or cleaner in cylinder of a steam-engine. The associated cut signifies a form of the signal. The pipe utilizing the stop-cock is screwed to the cylinder in order that once the dick is exposed the pressure associated with the vapor within may enter the cylinder above, hit the piston up resistant to the activity of a spring constructed to offer a definite resistance in pounds per square inch, and cause the lever-arm to go up and mark on the hollow cylinder within kept a vertical trace, the height which measures the pressure. A card or a sheet of report might be suited to this cylinder, additionally the trace be manufactured regarding the paper. The hollow cylinder is absolve to revolve, if drawn because of the free cord holding from it. To operate the signal, the cord is related to some moving part of the engine in order for an individual stroke for the piston causes the cylinder and also the card to revolve as soon as (the return being guaranteed by a spring) as pencil makes one mark. Considering that the pencil-mark is timed to a single stroke associated with engine, the resulting curved line from the card provides a graphic report of the stress or vacuum for the vapor during one full swing. These types of visual curves are called indicator-diagrams, the marked card being known as an indicator-card. See indicator-diagram, under drawing
    • The switch and pointer of a signal-telegraph applied to exclusive outlines, where rapidity of delivery of this messages just isn't crucial. It comprises of a dial having the letters of the alphabet imprinted upon it, and a pointer that traverses the circle, pausing before the letters of word transmitted, thus spelling out of the message. See telegraph.
    • In a microscope, an arrangement for marking the positioning of a specific object in the field of view. Quekett's signal was a steel finger connected with the eyepiece.
    • In mining, an arrangement in the shape of that your position of cage in the shaft is known to the guy in charge of the winding-engine.
    • when you look at the concept of figures, the exponent of that energy of any quantity under and prime to your modulus, which energy may be the minimum power of the identical quantity congruous to unity.
    • In physiology, the extensor indicis, a muscle which stretches the forefiuger, as in the work of pointing. It arises from the back of the ulna, and is placed in to the index-finger, which could therefore be straightened by themselves of this various other hands.
    • In ornithology: A honey-guide; a species associated with genus Indicator or family Indicatoridæ.
    • [capitalized] the standard and leading genus of Indicatoridæ, set up by Vieillot in 1816. I. major and I. small are examples. See Indicatoridæ.
    • In railroad signaling, a computer device for informing the leverman in a signal-cabin that a train is approximately to begin from station and indicating which monitor it may need; in its largest sense, any device for displaying, in signal-cabin, the condition of a track or of all the tracks in a yard, the position associated with the signals, semaphores, switches, and signal-lamps, the trains at rest, or moving, or around to enter or keep any block, etc. The signal might be lots on a drop-plate, a disk or banneret, or a miniature signal-arm, plus it may give information by its appearance or disappearance or by its position. It might also give a sign by means of a bell. An indicator are run from a distant section or cabin by a push-button, or it might be automated, or it may possibly be managed by a train through a track-circuit.
    • In mining, an appearance of this area regarding the ground which ultimately shows the current presence of a mineral underneath.
    • Naval: An apparatus used in conjunction with a transmitter, operated by mechanical or electrical means for signaling orders from a central position to the various places on a war-ship at which the orders are to be executed. The transmitter is manipulated by the operator in the central station or in the conning-tower to show any desired order, and the same order is shown on one or more indicators connected to the transmitter by wires or shafting. A range-indicator shows the range of the object at which the guns are to be fired; a battle-order indicator shows various orders such as ‘commence firing,’ ‘load with shell,’ etc. An apparatus to show at a convenient Point the position of any mechanism: as, a revolution-indicator to show the direction of revolution of the main engines; a rudder -indicator, to show the position of the helm or rudder; a turret-indicator, to show the position of the turret guns with reference to the fore-and-aft line of the ship; etc.
    • (biochemistry) a substance that changes shade to indicate the current presence of some ion or compound; can be used to indicate the completion of a chemical effect or (in medication) to try for a certain reaction
    • lots or ratio (a value on a scale of measurement) produced from a few observed facts; can reveal general changes as a function period
    • a tool for showing the running problem of some system
    • a signal for attracting interest
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