ケノトロンMeanings1nounkenotronA type of vacuum tube rectifier used in early high-voltage power supplies. Technical term in electronics.ケノトロンは高こう電でん圧あつ整せい流りゅうに使つかわれた真しん空くう管かんの一いっ種しゅです。A kenotron is a type of vacuum tube used for high-voltage rectification.