a·que·ous

[ey-kwee-uhs, ak-wee-]
adjective
1.
of, like, or containing water; watery: an aqueous solution.
2.
(of rocks or sediments) formed of matter deposited in or by water.

Origin:
1635–45; aqu(a) + -eous

a·que·ous·ly, adverb
a·que·ous·ness, noun
non·a·que·ous, adjective
su·per·a·que·ous, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
aqueous (ˈeɪkwɪəs, ˈækwɪ-) [Click for IPA pronunciation guide]
 
adj
1.  of, like, or containing water
2.  dissolved in water: aqueous ammonia
3.  (of rocks, deposits, etc) formed from material laid down in water
 
[C17: from Medieval Latin aqueus, from Latin aqua water]

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Aqueous is always a great word to know.
So is quincunx. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
Etymonline
Word Origin & History

aqueous
1640s, from L. aqua "water," on analogy of Fr. aqueux "watery" (which, however, is from L.L. aquosus "abounding in water"). Aqueous humor attested from 1640s.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

aqueous a·que·ous (ā'kwē-əs, āk'wē-)
adj.
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.
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American Heritage
Science Dictionary
aqueous   (ā'kwē-əs)  Pronunciation Key 
  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 © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The goal of standard glaucoma surgery is to reduce pressure in the eye by
  increasing the outflow of the aqueous fluid.
It is so aqueous that except when frozen, overland travel is extremely
  difficult.
Put diatoms into aqueous solution inside vacuum tight chamber.
It seemed to mark the dawning of some new aqueous age.
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