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hydrosphere

noun [C]
 
 
/ˈhaɪ.drəʊ.sfɪər/ US  /-droʊ.sfɪɚ/ specialized

Definition

all of the water, ice, and water vapour at or near the surface of the Earth, such as the seas and ice, clouds, and the water in and under the groundWater in general
(Definition of hydrosphere noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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