Definition of hydro- in English:

hydro-

Pronunciation: /ˈhʌɪdrəʊ/
(also hydr-)

combining form

  • 1Water; relating to water: hydraulic hydrocolloid
  • 1.1 Medicine Affected with an accumulation of serous fluid: hydrocephalus
  • 2 Chemistry Combined with hydrogen: hydrocarbon

Origin

from Greek hudōr 'water'.

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Word of the day maelstrom
Pronunciation: ˈmālˌsträm
noun
a powerful whirlpool in the sea