from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Any of a class of yellow to red pigments, including the carotenes and the xanthophylls.
  • adj. Of or relating to such a pigment.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of a class of yellow to red plant pigments including the carotenes and xanthophylls.
  • adj. Of, or relating to such a class of pigments.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. any of a class of highly unsaturated yellow to red pigments occurring in plants and animals


Sorry, no etymologies found.


  • He was soon drawn deeply into studies of how the small variations in carotenoid structures are involved in biological functions.

    Richard Kuhn and the Chemical Institute: Double Bonds and Biological Mechanisms

  • It starts with shorter days, which triggers a whole series of processes, says Ed Hedborn, a botanist who manages plant records at the Morton Arboretum outside Chicago in Lisle, Ill. With less daylight, trees and other plants stop making chlorophyll, whose absence unmasks the yellow, orange and brown hues of the pigment carotenoid, which is always in the leaves, but hidden by the green.

    Fall in the Midwest: Colors are subtle but lasting

  • Carotenoids are a group of over 600 compounds known as the carotenoid pigments.

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  • Hey, protection from free-radical damage all day long -- can't beat that, especially when it comes to one type of cancer: OJ contains something called carotenoid cryptoxanthin, and it's associated with a 15-31 percent reduced lung cancer risk.

    That's Fit

  • TomatoesOne of the nutritional highlights of this fruit is the 'carotenoid' nutrient lycopene, which research links with protection from conditions such as heart disease and cancer.

    What's in your basket, Joan Jett?

  • TomatoesTomatoes are rich in a so-called "carotenoid" nutrient, which has links to a reduced risk of heart disease.

    What's in your basket, Gael García Bernal?

  • Computer Eye Strain Formula, a daily supplement sold by EyeScience Labs LLC of Columbus, Ohio, contains astaxanthin, lutein and zeaxanthin, which are carotenoid antioxidants in the same family as those found in carrots.

    Tired Eyes? A Look at 4 Remedies

  • Since birds with a high parasite load cannot store as much carotenoid pigments, their colouring is not as brilliant as that of healthier individuals.

    Mystery bird: scarlet ibis, Eudocimus ruber

  • Kale is an incredibly rich source of immune-boosting carotenoid and flavanoid antioxidants, as well as vitamins A and C.

    Organic 7 Reasons Kale Is the New Beef

  • For example, while investigating how the chemical structure of the carotenoid pigments affects the determination of color, Kuhn showed how the backbone sequence of single and double-bound carbon atoms give the polyenes their light absorbing properties and how slight variations create important differences in frequencies of light that could be absorbed - i.e. the variant colors we observe.

    Richard Kuhn and the Chemical Institute: Double Bonds and Biological Mechanisms


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