English dictionary
cofferdam
/'k/O/f/@/r,d/&/m/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
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large watertight chamber used for construction under water
Source: WordNet 3.0
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A water- tight inclosure, as of piles packed with clay, from which the water is pumped to expose the bottom (of a river, etc.) and permit the laying of foundations, building of piers, etc.
Source: webster1913