from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of or relating to the internal heat of the earth.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. pertaining to heat energy extracted from reservoirs in the earth's interior
from The Century Dictionary and Cyclopedia
- n. A line connecting places having the same temperature at a given depth below the earth's surface. Geothermic degree.See degree.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. of or relating to the heat in the interior of the earth
Sorry, no etymologies found.