a·que·ous 
(ākwē-əs, ăkwē-)
(ākwē-əs, ăkwē-)adj.
1. Relating to, similar to, containing, or dissolved in water; watery.
2. Geology Formed from matter deposited by water, as certain sedimentary rocks.
[From Medieval Latin aqueus, from Latin aqua, water; see AQUA.]