[ ey-kwee-uhs, ak-wee- ]
See synonyms for aqueous on
  1. of, like, or containing water; watery: an aqueous solution.

  2. (of rocks or sediments) formed of matter deposited in or by water.

Origin of aqueous

First recorded in 1635–45; aqu(a) + -eous

Other words from aqueous

  • a·que·ous·ly, adverb
  • a·que·ous·ness, noun
  • non·a·que·ous, adjective
  • su·per·a·que·ous, adjective

Words Nearby aqueous Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use aqueous in a sentence

British Dictionary definitions for aqueous


/ (ˈeɪkwɪəs, ˈækwɪ-) /

  1. of, like, or containing water

  2. dissolved in water: aqueous ammonia

  1. (of rocks, deposits, etc) formed from material laid down in water

Origin of aqueous

C17: from Medieval Latin aqueus, from Latin aqua water

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for aqueous


[ ākwē-əs ]

  1. Chemistry Relating to or dissolved in water.

  2. Geology Formed from matter deposited by water. Certain sedimentary rocks, such as limestone, are aqueous.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.