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hydrogenolysis
hydrogenous
hydrogeology
hydrography
hydroid
hydrokinetics
hydrolase
hydrologic cycle
hydrology
hydrolysate
hydrolyse
hydrolysis
hydrolyze
hydromagnetics
hydromancy
hydromechanics
hydromedusa
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hydrology
hy·drol·o·gy [ hī drólləjee ]


noun 
Definition:
 
study of earth's water: the scientific study of the properties, distribution, use, and circulation of the water on Earth and in the atmosphere in all of its forms

hy·drol·o·gist noun
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