Large watertight chamber used for construction under water
English: caisson, pneumatic caisson, cofferdam
caissonEnglish
caisson, ammunition chest, coffer, cofferdam, lacuna
Noun
A chest to hold ammunition
English: caisson, ammunition chest
An ornamental sunken panel in a ceiling or dome
English: coffer, caisson, lacuna
1 more noun senses
A two-wheeled military vehicle carrying artillery ammunition
English: caisson