colour index


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colour index

or

color index

n
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
References in periodicals archive ?
The V-Rc colour index of 0.326 as measured by TB, as well as that of 0.315 derived from 2MASS (see remarks about Table 2, above) indicate a blended spectral type of around F2 and temperature ~7000 K.
MAHATMA GANDHI'S haemoglobin level, blood colour index and red blood cell count, as recorded 10 days before his assassination, will see the light of day when Los Angeles- based billionaire James Otis puts the blood report up for auction within a week.
Sun Chemical Performance Pigments offers a range of Colour Index types in a variety of physical forms, including conventional dry color, water based dispersions and standardized high solid press cakes.
The InCa trial groups showed a range of improvements compared with their respective controls: marketable yield up by 10-15%; shelf life increased by 8%; colour improved by 7%, based on measurement of CIRG (colour index for red grapes) which is a standard statistical calculation; and sugar content increased by 20%.