[ ey-kwee-uh s, ak-wee- ]
/ ˈeɪ kwi əs, ˈæk wi- /


of, like, or containing water; watery: an aqueous solution.
(of rocks or sediments) formed of matter deposited in or by water.

Nearby words

  1. aquatone,
  2. aquavit,
  3. aqueduct,
  4. aqueduct of sylvius,
  5. aqueductus,
  6. aqueous ammonia,
  7. aqueous chamber,
  8. aqueous humor,
  9. aqueous humour,
  10. aqueous phase

Origin of aqueous

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

Related formsa·que·ous·ly, adverba·que·ous·ness, nounnon·a·que·ous, adjectivesu·per·a·que·ous, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for aqueous

British Dictionary definitions for aqueous


/ (ˈeɪkwɪəs, ˈækwɪ-) /


of, like, or containing water
dissolved in wateraqueous ammonia
(of rocks, deposits, etc) formed from material laid down in water

Word Origin for 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

Word Origin and History for aqueous



1640s, from Latin aqua "water" (see aqua-) 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.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for aqueous


[ ākwē-əs, ăkwē- ]


Relating to, similar to, containing, or dissolved in water; watery.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for aqueous


[ ākwē-əs ]

Chemistry Relating to or dissolved in water.
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.