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English - English (Wordnet) dictionary (also found in English - Vietnamese, French - Vietnamese)
ballast
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Noun
  • an electrical device for starting and regulating fluorescent and discharge lamps
  • a resistor inserted into a circuit to compensate for changes (as those arising from temperature fluctuations)
  • an attribute that tends to give stability in character and morals; something that steadies the mind or feelings
  • coarse gravel laid to form a bed for streets and railroads
  • any heavy material used to stabilize a ship or airship
Verb
  • make steady with a ballast
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