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Colour index

(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
(geology) the sum of the dark or coloured minerals of a rock, expressed as a percentage of the total minerals
(chem, physics) a systematic arrangement of colours according to their hue, saturation, and brightness


Read Also:

  • Colourist

    /ˈkʌlərɪst/ noun 1. a person who uses colour, esp an artist 2. a person who colours photographs, esp black-and-white ones

  • Colourize

    /ˈkʌləˌraɪz/ verb 1. (transitive) to add colour electronically to (an old black-and-white film)

  • Colourless

    /ˈkʌləlɪs/ adjective 1. without colour 2. lacking in interest: a colourless individual 3. grey or pallid in tone or hue 4. without prejudice; neutral

  • Colour line

    noun 1. the social separation of racial groups within a community (esp in the phrase to cross the colour line)

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