A person, boat, or machine that dredges; specifically, a vessel or equipment used to excavate and remove material from the bottom of water bodies.
From 'dredge' + '-er' (Old English agent suffix). The '-er' suffix creates nouns referring to a person or thing that performs the action of the verb.
The dredger has a fascinating history—these massive machines literally reshaped global trade by deepening harbors and creating shipping channels, transforming which ports could accommodate large ships.
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