Also found in: Thesaurus, Medical, Legal, Financial, Acronyms, Encyclopedia, Wikipedia.
1. (Astronomy) 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. (Geological Science) geology the sum of the dark or coloured minerals of a rock, expressed as a percentage of the total minerals
3. (Chemistry) chem physics a systematic arrangement of colours according to their hue, saturation, and brightness
4. (General Physics) chem physics a systematic arrangement of colours according to their hue, saturation, and brightness
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014