TETRODE
Meaning of TETRODE in English
/te"trohd/ , n. Electronics.
a vacuum tube containing four electrodes, usually a plate, two grids, and a cathode.
[ 1900-05; TETR- + -ODE 1 ]
Random House Webster's Unabridged English dictionary.
Полный английский словарь Вебстер - Random House .
2012