Home › Words › H › hydrospherehydrospherehydrosphere means all the liquid waters of the Earth or another astronomical body, as distinguished from the land and the gases of the atmosphere.EtymologyFrom hydro- + -sphere.nounAll the liquid waters of the Earth or another astronomical body, as distinguished from the land and the gases of the atmosphere.Definitions & examples from Wiktionary (CC BY-SA 3.0).