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Meaning of spark-killer

spark-kil•ler

Pronunciation: (spärk'kil"ur), [key]
— n. Elect.
  1. a device for diminishing sparking, consisting of a capacitor and a resistor connected in series across two points where sparking may occur in a circuit.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.