It actually means this. relating to heated water under earth.
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).
ice be
ice be
likelier likeliest
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.
Hydrothermal power requires a suitable hot spring.
Hydrothermal refers to heated (thermal) water (hydro).
'MEANING' in other words can be the 'vocabulary' of a word or the 'essence' of the word as to what the word precisely means. OR meaning is the meaning of meaning what you just said meaning