"Hydrothermal" refers to processes involving hot water, typically in geological contexts. It often describes the movement of heated water through the Earth's crust, which can lead to the formation of mineral deposits, hot springs, and geysers. This heated water can originate from magma or geothermal energy sources, influencing the surrounding environment. In addition to geological formations, hydrothermal systems are significant in the study of geothermal energy. They provide a renewable energy source by harnessing the heat from the Earth. Hydrothermal vents, found on the ocean floor, also support unique ecosystems, showcasing the diverse life forms that thrive in extreme conditions.