the watery part of the earth's surface, including oceans, lakes, water vapour in the atmosphere, etc
Derived forms
hydrospheric (ˌhydroˈspheric)
adjective
hydrosphere in American English
(ˌhaɪdroʊˌsfɪr; ˌhaɪdrəˌsfɪr)
noun
all the water on the surface of the earth, including oceans, lakes, glaciers, etc.: water vapor, clouds, etc. may be considered part of the atmosphere or the hydrosphere