noun
: an electron tube that by a variation of its operating voltage can give the effect of a variation of reactance across its electrodes or across a network connected to its electrodes
noun
: an electron tube that by a variation of its operating voltage can give the effect of a variation of reactance across its electrodes or across a network connected to its electrodes
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012