Dredger \Dredg"er\, n.1. One who fishes with a dredge.
2. A dredging machine.
Source: Webster's Revised Unabridged Dictionary (1913)
Dredger \Dredg"er\, n. (Cookery) A box with holes in its lid; -- used for sprinkling flour, as on meat or a breadboard; -- called also dredging box, drudger, and drudging box.