a·que·ous (ākwē-əs, ăkwē-)
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.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.