Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
geothermally is an adverb meaning "by means of heat from the interior of the earth". It carries one recorded sense.
by means of heat from the interior of the earth
Definitions, synonyms and semantic relations for geothermally come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.