[ak-wuh-rel, ah-kwuh-; French a-kwa-rel]
noun, plural aquarelles [ak-wuh-relz; French a-kwa-rel] .
a watercolor.
Printing. a printed picture that has been colored manually by applying watercolor through stencils, each color requiring a different stencil.

1865–70; < French < Italian acquarella (now obsolete) watercolor, equivalent to Latin aquār(ius) of water (see aquarium) + Italian -ella -elle

aquarellist, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
aquarelle (ˌækwəˈrɛl)
1.  a method of watercolour painting in transparent washes
2.  a painting done in this way
[C19: from French]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

1869, from Fr. aquarelle (18c.), from It. acquerella "water-color," dim. of acqua, from L. aqua "water" (see aqua-).
Online Etymology Dictionary, © 2010 Douglas Harper
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Encyclopedia Britannica


technique of painting in transparent, rather than opaque, watercolours. Although aquarelle was known to the ancient Egyptians, it did not achieve popularity in Europe until the 18th and 19th centuries. It was used especially in France and England by landscape painters.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
The wastewater will be generated by washing machines and then treated by an aquarelle treatment system prior to being discharged.
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