follow Dictionary.com

What is the X in X-mas?

colour index

noun
1.
(astronomy) the difference between the apparent magnitude of a star measured in one standard waveband and in a longer standard waveband, indicating its colour and temperature
2.
(geology) the sum of the dark or coloured minerals of a rock, expressed as a percentage of the total minerals
3.
(chem, physics) a systematic arrangement of colours according to their hue, saturation, and brightness
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source

Word of the Day

Word Value for colour

8
11
Scrabble Words With Friends