Longman Dictionary of Contemporary English homepage

Language: Old French
Origin: Latin, from Greek, from hydor 'water'

hydro-

 prefix
     
Related topics: Elements
hydro-
1 relating to water, or using water:
hydroelectricity (=produced by water power)
hydrotherapy (=treatment of disease using water)
2HCE relating to hydrogen, or containing it:
hydrocarbons
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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