ballast resistor

noun
ballast ( def 5a ).
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WordNet
ballast resistor

noun
a resistor inserted into a circuit to compensate for changes (as those arising from temperature fluctuations) 
WordNet® 3.0, © 2006 by Princeton University.
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00:10
ballast resistor is always a great word to know.
So is slumgullion. Does it mean:
a chattering or flighty, light-headed person.
a stew of meat, vegetables, potatoes, etc.
Example sentences
For example, the ballast resistor in a fluorescent lighting system is included for good reason.
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