colour index

noun

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

Example Sentences

“Cheaper LEDs will have a lower colour index of about 80, whereas daylight is about 100,” says Storey.

From The Guardian

Colour index: black indicates highest level of expression, followed by purple, red then down to white indicating no expression.

From Nature

Colour index: black indicates highest level of expression, followed by purple, red then down to white indicating no expression.

From Nature

Colour index represents the average of the genetic distance of accessions to all cultivated rice accessions.

From Nature

Colour index represents the average of the genetic distance of accessions to all cultivated rice accessions.

From Nature