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ZENER DIODE: A diode that exhibits in the avalanche-breakdown region a large change in reverse current over a very narrow range in reverse voltage. This characteristic permits a highly stable reference voltage to be maintained across the diode despite a wide range of current. [Manufacturers of Zener Diodes]
ZENER EFFECT. A reverse breakdown effect in diodes in which breakdown occurs at reverse voltages below 5 volts. The presence of a high energy field at the junction of a semiconductor produces the breakdown.
ZULU TIME. Synonym, Coordinated Universal Time. Formerly a synonym for Greenwich Mean Time. Abbreviation; Z Time. [Military].
