dredger

noun

1. A vessel equipped for the removal of sand or sediment from the seabed.

   “The section includes also combination bucket and suction dredges, true suction dredgers, the Friihling dredge, the reclamation dredge, the longshoot dredge, the hopper barge, the self-propelling hopper, and the rock cutter.”

2. One who fishes with a dredge.
3. A dredging machine.
4. A container with a perforated lid, used to sprinkle sugar or flour.

   “In the kitchen Mrs. Piper was busy with a flour dredger, a rolling pin, and a basin of dough.”