'Hydrosphere' definitions:

Definition of 'hydrosphere'

From: WordNet
noun
The watery layer of the earth's surface; includes water vapor

Definition of 'Hydrosphere'

From: GCIDE
  • Hydrosphere \Hy"dro*sphere\, n. [Pref. hydro-, 1 + sphere.]
  • 1. (Meteor.) The aqueous vapor of the entire atmosphere. [Webster 1913 Suppl.]
  • 2. (Phys. Geog.) The aqueous envelope of the earth, including the ocean, all lakes, streams, and underground waters, and the aqueous vapor in the atmosphere. [Webster 1913 Suppl.]

Synonyms of 'hydrosphere'

From: Moby Thesaurus