Meaning : Any heavy material used to stabilize a ship or airship.
Meaning : Coarse gravel laid to form a bed for streets and railroads.
Meaning : An attribute that tends to give stability in character and morals. Something that steadies the mind or feelings.
Meaning : A resistor inserted into a circuit to compensate for changes (as those arising from temperature fluctuations).
Synonyms : ballast resistor, barretter
Meaning : An electrical device for starting and regulating fluorescent and discharge lamps.
Synonyms : light ballast