[ dahy-nuh-tron ]
/ ˈdaɪ nəˌtrɒn /

noun Electronics.

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.

Origin of dynatron

First recorded in 1915–20; dyna- + -tron
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019