Hypertext Webster Gateway: "dredging"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Dredge \Dredge\, v. t. [imp. & p. p. {Dredged}; p. pr. & vb. n.
{Dredging}.]
To catch or gather with a dredge; to deepen with a dredging
machine. --R. Carew.
{Dredging machine}, a machine (commonly on a boat) used to
scoop up mud, gravel, or obstructions from the bottom of
rivers, docks, etc., so as to deepen them.
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