Search Result for "hydrosphere": 
Wordnet 3.0

NOUN (1)

1. the watery layer of the earth's surface; includes water vapor; 



The Collaborative International Dictionary of English v.0.48:

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.]


WordNet (r) 3.0 (2006):

hydrosphere
    n 1: the watery layer of the earth's surface; includes water
         vapor