Definition of hydro- in English:

hydro-

(also hydr-)

combining form

  • 1Water; relating to water.

    ‘hydraulic’
    ‘hydrocolloid’
    1. 1.1Medicine Affected with an accumulation of serous fluid.
      ‘hydrocephalus’
  • 2Chemistry
    Combined with hydrogen.

    ‘hydrocarbon’

Origin

From Greek hudōr ‘water’.

Pronunciation

hydro-

/ˈhʌɪdrəʊ/