cofferdam

2 definitions found

cofferdam - Collaborative International Dictionary of English v.0.48 :

  Cofferdam \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.
     [1913 Webster]

cofferdam - WordNet (r) 2.1 (2005) :

  cofferdam
      n 1: large watertight chamber used for construction under water
           [syn: caisson, pneumatic caisson, cofferdam]