Watercolor (noun)
A painting technique using paint made of colorants suspended or dissolved in water.
Watercolor (noun)
Any artwork produced by this method.
Watercolor (noun)
Any paint used in this method.
Watercolor (adjective)
Pertaining to the methods or products of watercolor.
Aquarelle (noun)
A watercolour painting
Aquarelle (noun)
A printed picture coloured by the application of watercolor through stencils, using a different stencil for each colour.
Wiktionary
Aquarelle (noun)
the technique of painting with thin, transparent watercolours (as distinct from gouache)
“a cover illustrated in aquarelle”
Aquarelle (noun)
a painting made using the technique of aquarelle.
Oxford Dictionary