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) 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
) the sum of the dark or coloured minerals of a rock, expressed as a percentage of the total minerals
) 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
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