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Rhenish
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rheobase
rheology
rheometer
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rheostat
rhe·o·stat [ r ə stàt ] (plural rhe·o·stats)


noun 
Definition:
 
adjustable resistor: a resistor designed to allow variation in resistance without breaking the electrical circuit of which it is a part

rhe·o·stat·ic [ r ə státtik ] adjective
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