Varactor meaning

və-răk'tər, vă-
A semiconductor device in which the capacitance is sensitive to the applied voltage at the boundary of the semiconductor material and an insulator.
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A semiconductor diode capacitor whose capacitance varies with the voltage applied.
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(electronics) A solid-state diode whose capacitance varies with the applied voltage.
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Origin of varactor

  • var(iable) (re)act(ance) –or
    From American Heritage Dictionary of the English Language, 5th Edition
  • Blend of variable and reactor
    From Wiktionary