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Definition of Hydrothermal vent
1. Noun. a hot spring, on the floor of the ocean, mostly along the central axes of the mid-ocean ridges, where heated fluids emerge from fissures in the Earth's crust ¹
¹ Source: wiktionary.com
Medical Definition of Hydrothermal vent
1. A natural spring which vents warm or hot water on the sea floor, associated with spreading of the Earth's crust. (09 Oct 1997)