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dynatron

American  
[dahy-nuh-tron] / ˈdaɪ nəˌtrɒn /

noun

Electronics.
  1. a tetrode, once frequently used as an oscillator in radio, in which an increase in the plate voltage results in a decrease in the plate current because of emission of electrons from the plate.


Etymology

Origin of dynatron

First recorded in 1915–20; dyna- + -tron