geothermal

Energy from the earth, derived as heat.

geothermal

geothermic adjective of or relating to the heat in the interior of the earth
Found on http://wordnetweb.princeton.edu/perl/webwn?s=geothermal

geothermal

geothermal 1. Relating to, or caused by, the internal heat of the earth. 2. Describing an energy system that makes use of the internal heat produced by the earth.
Found on http://www.wordinfo.info/words/index/info/view_unit/4265/6

Geothermal

Pertaining to the heat of the interior of the earth.
Found on http://www.evcforum.net/WebPages/Glossary_Geology.html
No exact match found