plural of perma-frown

plural of permanent way

plural of permanent magnet

plural of permanent marker

plural of permanent loan

plural of permutation lock

plural of permissive-action link

A security device to prevent unauthorized arming or detonation of a nuclear weapon.

(Marxism) The status of a revolutionary class where it continues to push for and achieve its interests despite the political dominance of those with opposing interests.

plural of permanent revolution