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词汇 lutein
释义

Definition of lutein in English:

lutein

noun ˈluːtɪɪnˈludiən
mass nounBiochemistry
  • A deep yellow pigment of the xanthophyll class, found in the leaves of plants, in egg yolk, and in the corpus luteum.

    〔生化〕叶黄素,黄体激素

    Example sentencesExamples
    • Cataract patients also tend to be deficient in vitamin A and the carotenes, lutein and zeaxanthin.
    • The yellow colour comes largely from carotenoids, which hens get from plant foods, or lutein, which is added to feeds specifically to colour egg yolk.
    • While the root of the beet is a nutritional powerhouse, the leaves are just as potent, containing antioxidant carotenoids, chlorophyll and lutein.
    • In this study, visual function is improved with lutein alone or lutein together with other nutrients.
    • Companies don't usually test for phytochemicals like lutein or lycopene because they're not yet considered nutrients.

Origin

Mid 19th century: from Latin luteum 'yolk of egg' (neuter of luteus 'yellow') + -in1.

Definition of lutein in US English:

lutein

nounˈlo͞odēənˈludiən
Biochemistry
  • A deep yellow pigment of the xanthophyll class, found in the leaves of plants, in egg yolk, and in the corpus luteum.

    〔生化〕叶黄素,黄体激素

    Example sentencesExamples
    • Companies don't usually test for phytochemicals like lutein or lycopene because they're not yet considered nutrients.
    • The yellow colour comes largely from carotenoids, which hens get from plant foods, or lutein, which is added to feeds specifically to colour egg yolk.
    • Cataract patients also tend to be deficient in vitamin A and the carotenes, lutein and zeaxanthin.
    • While the root of the beet is a nutritional powerhouse, the leaves are just as potent, containing antioxidant carotenoids, chlorophyll and lutein.
    • In this study, visual function is improved with lutein alone or lutein together with other nutrients.

Origin

Mid 19th century: from Latin luteum ‘yolk of egg’ (neuter of luteus ‘yellow’) + -in.

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