chroma /krōˈmə/

1. Quality of colour
2. A hue
3. (in colour television) the colour component of a signal

chrōmatˈic adjective

1. Relating to, or consisting of, colours
2. Coloured
3. Relating to notes in a melodic progression, which are raised or lowered by accidentals, without changing the key of the passage, and also to chords in which such notes occur (music)

chrōmatˈically adverb

chrōmatˈicism noun (music)

1. The state of being chromatic
2. The use of chromatic tones

chrōmaticity /-tisˈ/ noun

The colour quality of light, one method of defining it being by its purity (saturation) and dominant wavelength

chrōmatˈics singular noun

The science of colours

chrōˈminance noun (TV)

The difference between any colour and a reference colour of equal luminance

chrōˈmakey noun (TV)

A special effect in which a coloured background can be removed from a picture and a different background substituted

chromatic aberration noun

The blurring of an optical image, with colouring of the edges, caused by light of different wavelengths being focused at different distances

chromatic adaption noun (botany)

Differences in amount or proportion of photosynthetic pigments in plants in response to the amount and colour of available light

chromaticity co-ordinates plural noun (physics)

Numbers whose values are used to specify a colour

chromaticity diagram noun (physics)

A diagram on which the chromaticity of a colour is plotted

chromatic scale noun (music)

A scale proceeding by semitones

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