plunge : Idioms & Phrases
Plunge , ∨ plunging , battery
(Elec.) , a voltaic battery so arranged that the plates can be plunged into, or withdrawn from, the exciting liquid at pleasure.
Webster 1913
Plunge bath
- an immersion by plunging; also, a large bath in which the bather can wholly immerse himself.
Webster 1913
Plunging fire
(Gun.) , firing directed upon an enemy from an elevated position.