of or relating to the action of water under conditions of high temperature, esp in forming rocks and minerals
Derived forms
hydrothermally (ˌhydroˈthermally)
adverb
hydrothermal in American English
(ˌhaɪdrəˈθɜrməl)
adjective
having to do with hot water; esp., having to do with the action of hot water in producing minerals andsprings or in dissolving, shifting, and otherwise changing the distribution of minerals in the earth's crust