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Definition of: rheostat
Our photo definition of rheostat 
(rē′ə·stat) noun Electr.
A device for regulating current-strength of electricity, as by resistance coils. [<RHEO- + Gk. statos standing]
—rhe′o·stat′ic adjective
a. Sliding contact.
b. Resistance coil.
c. Lug.
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