of or relating to the action of water under conditions of high temperature, esp in forming rocks and minerals
WordReference Random House Unabridged Dictionary of American English © 2025
hy•dro•ther•mal
(hī′drə thûr′məl),USA pronunciation adj. [Geol.]
hy′dro•ther′mal•ly, adv.
- Geologynoting or pertaining to the action of hot, aqueous solutions or gases within or on the surface of the earth.
- hydro-1 + thermal 1840–50
Collins Concise English Dictionary © HarperCollins Publishers::
'hydrothermal' also found in these entries (note: many are not synonyms or translations):