D defs.my
Entry 1 sense Webster, 1913

Pontvolant

/(?; F. ?)/ · Pont·vo·lant · IPA
01 n. A kind of light bridge, used in sieges, for surprising a post or outwork which has but a narrow moat; a flying bridge.
  1. 1.
    A kind of light bridge, used in sieges, for surprising a post or outwork which has but a narrow moat; a flying bridge.(Mil.)