pneumatic caisson
- noun
- /njuˈmætɪk ˈkeɪsən/
- Specialized
:
caisson neumático
- The workers entered the pneumatic caisson to begin building the bridge's underwater foundation.
Examples
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Engineers monitored air pressure carefully inside the pneumatic caisson during construction.
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A pneumatic caisson was used to construct the tunnel beneath the river safely.
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A pneumatic caisson is crucial for underwater work.
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The engineer designed a pneumatic caisson for the underwater project.
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A pneumatic caisson allows construction workers to operate safely underwater by keeping water out.
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The construction team relied on a pneumatic caisson to maintain a dry environment while they built the foundation below the river.
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Using a pneumatic caisson prevented water from entering the work area during the underwater excavation.
Synonyms
1
9.6
A large watertight chamber that lets workers build under water
Surface Forms
Morphology
The meaning is directly compositional: 'pneumatic' (operated by compressed air) modifies 'caisson' (a sealed, often pressurized chamber), so a learner who knows both words can infer it is a sealed chamber kept under air pressure for underwater work. Although the term is technical, the adjective+noun combination is transparent and predictable across languages and contexts.
Etymology
Pneumatic caisson comes from a simple picture: it is a large box kept full of air under water so the water is pushed out and workers can go inside to build. The name breaks into pneumatic meaning 'air' and caisson meaning 'box', so it literally means an 'air box' used to keep water out during underwater construction, which explains its current meaning.