chrominance

 [kroh-muh-nuhns]  

chro·mi·nance

   [kroh-muh-nuhns]
noun Optics.
the difference in color quality between a color and a reference color that has an equal brightness and a specified chromaticity.
Origin:
1950–55; chrom- + (lum)inance
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Chrominance is always a great word to know.
So is interrobang. Does it mean:
a stew of meat, vegetables, potatoes, etc.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
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Collins
World English Dictionary
chrominance (ˈkrəʊmɪnəns)
 
—n
1.  the quality of light that causes the sensation of colour. It is determined by comparison with a reference source of the same brightness and of known chromaticity
2.  the information that defines the colour (hue and saturation) of a television image, but not the brightness
 
[C20: from chromo- + luminance]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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