Watt: One horsepower equals 746 watts.

Watt's Law: States that when one amp of current flows through a device with a one voltage drop, one watt of power id dissipated in the form of heat (p = I * E).

Wobble Plate: A rotating canted plate in an axial type piston pump which pushes the piston into their bores as it "wobbles".

Work: Exerting a force through a definite distance. Work is measured in units of force multiplied by distance, for example pund-foot.