geothermal

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geothermal

, geothermic
of or relating to the heat in the interior of the earth

Geothermal

The heat derived from the Earth. It is the thermal energy contained in the rock and fluid in the Earth’s crust.

geothermal

[¦jē·ō¦thər·məl]
(geophysics)
Pertaining to heat within the earth.