(In a thermionic valve or vacuum tube, especially a pentode) a coarse grid situated between electrodes, typically the screen grid and the anode, so as to repel secondary electrons emitted by the anode.
Origin
1930s; earliest use found in Electronics.
Definition of suppressor grid in US English:
suppressor grid
noun
Electronics
(In a thermionic valve or vacuum tube, especially a pentode) a coarse grid situated between electrodes, typically the screen grid and the anode, so as to repel secondary electrons emitted by the anode.