caisson, n.
(caissons)
(caissons)
large watertight chamber used for construction under water
<noun.artifact>
caisson cofferdam pneumatic caisson
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hypernym
a chest to hold ammunition
<noun.artifact>
ammunition chest caisson
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a two-wheeled military vehicle carrying artillery ammunition
<noun.artifact>
caisson
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hypernym
domain of synset (topic)
an ornamental sunken panel in a ceiling or dome
<noun.artifact>
caisson coffer lacunar
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hypernym