It actually means this. relating to heated water under earth.
Hydrothermal means pertaining to, or produced by, action of heated or super-heated water.
likelier, likeliest
Hydrothermal circulation in its most general sense is the circulation of hot water; 'hydros' in the Greek meaning water and 'thermos' meaning heat. Hydrothermal circulation occurs most often within the Earth's crust. so YES
The likeliest word is district, an area or region.
The likeliest meaning of Rhosddu is Black Moor. There are other possible derivations - but as a placename this is by far the most likely.
The likeliest word is recipe (a cooking list or guide).
The word hydrothermal pertains to the action of heated water or gases within the surface of the earth. Some of its disadvantages are: accessibility, permance, power generated and energy transportation.
A vein is a deposit of minerals found within a rock fracture that are not part of the host rock. A hydrothermal vein is a vein which is filled with minerals that contain large amounts of water. This water is chemically bound water, meaning that it is part of the chemical formula for that mineral.
ice be
ice be
Precipitated hydrothermal minerals.
Hydrothermal refers to heated (thermal) water (hydro).
Hydrothermal solutions are found in oceans