You searched for: “electric power plant
electric power plant (s) (noun), electric power plants (pl)
Machinery that converts raw energy into useful applications; such as, light, power for machinery, etc.: The electric power plant is a hydrosteam, diesel, or nuclear generating electrical station for uses of all kinds of equipment or transportation services.

This "plant" reference is apparently linked to the action of pressing on a shovel, or some other tool, with the "sole of the foot" in order to work the soil for planting.

This entry is located in the following units: electro-, electr-, electri- (page 12) planta-, plant- (page 1)