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1. (n.) rheostat
an adjustable resistor so constructed that its resistance may be changed without opening the electrical circuit in which it is connected, thereby controlling the current in the circuit.
Etymology: (1940–45)
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| Definition of 'rheostat' |
Princeton's WordNet |
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1. (noun) rheostat, variable resistor
resistor for regulating current
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| Definition of 'rheostat' |
Webster Dictionary |
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1. (noun) rheostat
a contrivance for adjusting or regulating the strength of electrical currents, operating usually by the intercalation of resistance which can be varied at will
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| Definition of 'rheostat' |
The Standard Electrical Dictionary |
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1. rheostat
An adjustable resistance; an apparatus for changing the resistance without opening the circuit. Its action may depend on the introduction of variable lengths of mercury column, of some other liquid, or of wire into a circuit. (See Rheostat, Wheatstone's.)
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Definitions of rheostat 
