hydrothermal Syllabification: (hy·dro·ther·mal)Pronunciation: /ˌhīdrəˈTHərməl/Definition of hydrothermal adjective of, relating to, or denoting the action of heated water in the earth’s crust. Derivatives hydrothermally adverb hydrothermal in other Oxford dictionaries Definition of hydrothermal in the British & World English dictionary
