Meaning of hydro

hy•dro

Pronunciation: (hī'drō), [key]
— n., pl. adj. -dros
—n.
  1. hydroelectric power.
  2. hydroplane.
    1. a bathhouse, hotel, or resort catering to people taking mineral-water health cures; spa.
    2. an establishment furnishing hydrotherapy.
—adj.
  1. of, pertaining to, or furnishing water, water power, or hydroelectricity: funds for new hydro projects.

hydro-

Pronunciation: [key]
  1. a combining form meaning “water,” used in the formation of compound words: hydroplane; hydrogen.

hydro-

Pronunciation: [key]
  1. a combining form representingin compound words, denoting esp. a combination of hydrogen with some negative element or radical: hydrobromic.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.