Related topics: Construction, Weapons
cais·son /ˈkeɪsən, kəˈsuːn $ ˈkeɪsɑːn, -sən/ noun [countableC] 1. TBCa large box filled with air, that people go into to work under water, for example when building bridges 〔水下作业用的〕沉箱
2. PMWa large box for carrying ammunition 弹药箱