an adjustable resistor so constructed that its resistance may be changed without opening the circuit in which it is connected, thereby controlling the current in the circuit.
Origin of rheostat
Related formsrhe·o·stat·ic, adjective
First recorded in 1843; rheo-
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for rheostatic
Historical Examples of rheostatic
British Dictionary definitions for rheostatic
Derived Formsrheostatic, adjective
a variable resistance, usually consisting of a coil of wire with a terminal at one end and a sliding contact that moves along the coil to tap off the current
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for rheostatic
1843, coined by English physicist Sir Charles Wheatstone (1802-1875) from Greek rheos "a flowing, stream" (from PIE root *sreu-, see rheum) + -stat "regulating device." Related: Rheostatic.
Online Etymology Dictionary, © 2010 Douglas Harper
The American Heritage® Science Dictionary
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