Screened

A term used to describe a radio valve (or tube) where the screen grid is arranged so as to give the maximum screening between the anode and the control grid. Commonly used in reference to pentode radio valves (or tubes).
Found on http://www.mhs.ox.ac.uk/marconi/collection/glossary.php

Screened

• (imp. & p. p.) of Screen
Found on http://thinkexist.com/dictionary/meaning/screened/
No exact match found