pentode

/ˈpɛnˌtoʊd/

UK: /ˈpɛn.təʊd/

pentode

English Noun

Definition

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.

Etymology

From pent- + -ode.