One of a group of red, orange, purple or yellow pigments typically found as accessory pigments in plants and some fungi. They are fat-soluble and are called lipochromes when they are found concentrated in animal fat. Carotenoids are widely used as food colorings, and one pigment, beta carotene, is used as a source of Vitamin A. Compare anthocyanin.

From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.