noun.
A colour between blue and green in the visiblespectrum; the complementary colour of red; the colour obtained by subtracting red from white light.
adjective.
Of the colour cyan.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a primary subtractive color for light; has a blue-green color
adjective.
of a bluish shade of green
Word Usage
"Scientists have used three fluorescent proteins in cyan, yellow and red – colours similar to those used by a computer printer – to colour the brain of a mouse."