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geothermal energy:see energy, sources ofenergy, sources of,
origins of the power used for transportation, for heat and light in dwelling and working areas, and for the manufacture of goods of all kinds, among other applications.
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1. Produced by using the heat below the earth’s surface. Geothermal heat pumps are necessary for residential use; for commercial use, power plants are built on the surface to convert geothermal energy into electricity. See also: Energy
2. Hot water or steam extracted from reservoirs beneath the Earth’s surface; can be used for heat pumps, water heating, or electricity generation. The term may also mean the use of near-constant underground temperatures by ground-source heat pumps to provide heating and cooling.
geothermal energy[¦jē·ō‚thərm·əl ′en·ər·jē]
Thermal energy contained in the earth; can be used directly to supply heat or can be converted to mechanical or electrical energy.