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You can see "subjective or optical colours" in the meaning of a word like "brilliance" but not in that of a word like "lipochrome."

Among the former may be mentioned lactic acid, glycerin, a lipochrome, and probably many other substances of a similar type whose separation has not yet been effected.

It contains chromatophores in many species, coloured by a mixed lipochrome pigment which appears to be distinct from diatomin.

In the iris of some fishes the golden red colour is produced by the light reflected from such a layer of guanin needles having to pass through a thin layer of a reddish pigment, known as a “lipochrome.”

As an example of a lipochrome which has been isolated, crystallized and purified, we may mention carotin, which has recently been found in green leaves.