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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 cof·fer·dam /-ˌdæm/

From: Webster's Revised Unabridged Dictionary (1913)

 Cof·fer·dam n. 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.

From: WordNet (r) 2.0

      n : large watertight chamber used for construction under water
          [syn: caisson, pneumatic caisson]