Dictionary
dy•na•tron
Pronunciation: (dī'nu-tron"), [key]—
n. 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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.