English Dictionary

Definition of “hydro-”

hydro- or sometimes before a vowel hydr-

Definitions

combining form

  1. indicating or denoting water, liquid, or fluid ⇒ hydrolysis, hydrodynamics
  2. indicating the presence of hydrogen in a chemical compound ⇒ hydrochloric acid
  3. indicating a hydroid ⇒ hydrozoan

Word Origin

from Greek hudōr water

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