Wiktionary
adv. By geothermal means, especially by means of geothermal energy
WordNet
adv. by means of heat from the interior of the earth
Usage examples of "geothermally".
Dust drifted upward through the beams of the lights and a slight shimmer from the geothermally heated ground of the mountainside shined nacreously.
It's continental land, though, not ocean bottom, and under West Antarctica it's a kind of basin and range zone, very geothermally active.
It’s continental land, though, not ocean bottom, and under West Antarctica it’s a kind of basin and range zone, very geothermally active.
Antarctica it’s a kind of basin and range zone, very geothermally active.
Despite the familiar sights, sounds, and smells of the dark, rough-hewn rock faces, the high, igneous stone ceilings and dripping stalactites, and the bubbling, geothermally heated pools of mineral-rich water, she knew that all her memories of this place had come from Jadzia Dax and previous hosts.