A device consisting of one or more blades used to level a seedbed.

An air-filled sac in many pelagic flora and fauna that serves to buoy up the body of the organism.

A file which has a single set of parallel teeth.

1. A flat, rectangular piece of wood with a handle, used to apply and smooth coats of plaster.

2. A mechanical device to finish the surface of freshly placed concrete paving.

3. A marble-polishing block.

4. Any structure that provides positive buoyancy such as a hollow, watertight unit that floats or rests on the surface of a fluid.

5. See <<plummet>>

An isolated, displaced rock or ore fragment.

See <<bank>>

1. A thread used to create patterns in fabric by passing over other threads.

2. A fabric defect caused by passing a thread over other threads where it should be interwoven.