Etymology
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aqueous (adj.)

"of the nature of or abounding in water," 1640s, from Latin aqua "water" (from PIE root *akwa- "water") on analogy of French aqueux "watery" (16c., which, however, is from Late Latin aquosus "abounding in water"). Or by analogy of Latin terreus "earthy," from terra "earth." Aqueous humor is the original use in English. Related: Aqueousness.

updated on May 14, 2017

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Definitions of aqueous from WordNet

aqueous (adj.)
similar to or containing or dissolved in water;
aqueous solutions
aqueous (adj.)
produced by the action of water;
Synonyms: sedimentary
From wordnet.princeton.edu, not affiliated with etymonline.