The chemical generation of electricity.
The therapeutic use of electricity directly applied to the body.
Any process of, or system designed to manage useful energy conversion.
Any combination of cams, gears, links, belts, chains and logical mechanical elements.
A mental, physical, or chemical process.
The theory that all natural phenomena can be explained by physical causes.
Any mechanical means for the conversion or control of motion, or the transmission or control of power.
A group of entities, such as objects, that interact together.