caisson
cais-son
noun
A watertight chamber used for construction work underwater or in wet ground.
"Workers built the bridge pier inside a caisson."
Thesaurus
Synonyms: ammunition chest, coffer, lacunar, cofferdam, pneumatic caisson
cais-son
A watertight chamber used for construction work underwater or in wet ground.
"Workers built the bridge pier inside a caisson."
Synonyms: ammunition chest, coffer, lacunar, cofferdam, pneumatic caisson