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Meaning Of Indicator
n.
One who, or that which, shows or points out; as, a fare
indicator in a street car.
n.
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
n.
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).
n.
A telltale connected with a hoisting machine, to show,
at the surface, the position of the cage in the shaft of a mine, etc.
n.
The part of an instrument by which an effect is
indicated, as an index or pointer.
n.
Any bird of the genus Indicator and allied genera. See
Honey guide, under Honey.
n.
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.