|1.||Also called: dredger a machine, in the form of a bucket ladder, grab, or suction device, used to remove material from a riverbed, channel, etc|
|2.||another name for dredger|
|3.||to remove (material) from a riverbed, channel, etc, by means of a dredge|
|4.||(tr) to search for (a submerged object) with or as if with a dredge; drag|
|[C16: perhaps ultimately from Old English dragan to |
(Job 24:6). See CORN.
large floating device for underwater excavation. Dredging has four principal objectives: (1) to develop and maintain greater depths than naturally exist for canals, rivers, and harbours; (2) to obtain fill to raise the level of lowlands and thus create new land areas and improve drainage and sanitation; (3) to construct dams, dikes, and other control works for streams and seashore; and (4) to recover subaqueous deposits or marine life having commercial value
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