pentode

About 0.16 uses per million words.

Meaning

1. noun A thermionic valve similar to a tetrode with the addition of a third grid, the suppressor grid to reduce the secondary emission effect; was/is used in high quality audio and radio products.

Similar words

diode mu cutoff hexode heptode tetrode octode nonode triac triad

Often followed by

is amplifier tube tubes and valve with or in