from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A temporary watertight enclosure that is pumped dry to expose the bottom of a body of water so that construction, as of piers, may be undertaken.
- n. A watertight chamber attached to the side of a ship to facilitate repairs below the water line.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A temporary watertight structure that is pumped dry to enclose an area underwater and allow construction work on a ship, bridge, or rig to be carried out; a caisson.
- n. An empty space that acts as a protective barrier between two floors or bulkheads on a ship.
from the GNU version of the Collaborative International Dictionary of English
- n. See Cofferdam, in the Vocabulary.
- 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 The Century Dictionary and Cyclopedia
- n. A water-tight wooden inclosure built in a body of water, in order to obtain a firm and dry foundation for bridges, piers, etc., by pumping out the water from its interior.
- n. In a war-ship, one of a series of compartments. in the vicinity of the water-line above the protective deck, built in the interior against the ship's side or around hatches, forming a double wall, which can be packed to prevent water from entering the vessel after the side has been pierced by shot. In the United States navy the packing is made of the pith of corn-stalks. See def. 2.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. large watertight chamber used for construction under water
Sorry, no etymologies found.