The Collaborative International Dictionary of English v.0.48:

Aqueous \A"que*ous\, a. [Cf. F. aqueux, L. aquosus, fr. aqua.
   See Aqua, Aquose.]
   1. Partaking of the nature of water, or abounding with it;
      watery.
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            The aqueous vapor of the air.         --Tyndall.
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   2. Made from, or by means of, water.
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            An aqueous deposit.                   --Dana.
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   Aqueous extract, an extract obtained from a vegetable
      substance by steeping it in water.

   Aqueous humor (Anat.), one the humors of the eye; a limpid
      fluid, occupying the space between the crystalline lens
      and the cornea. (See Eye.)

   Aqueous rocks (Geol.), those which are deposited from water
      and lie in strata, as opposed to volcanic rocks, which
      are of igneous origin; -- called also sedimentary rocks.
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WordNet (r) 3.0 (2006):

aqueous
    adj 1: similar to or containing or dissolved in water; "aqueous
           solutions"
    2: produced by the action of water [syn: aqueous,
       sedimentary] [ant: eruptive, igneous]