A substance of a deep yellow colour found in the yolk of eggs and the ovaries of animals.
| 单词 | θ18942 |
| 释义 | the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [noun] > ovum or ootid > yolk > lutein, etc. (2) lutein1869 A substance of a deep yellow colour found in the yolk of eggs and the ovaries of animals. luteotrophin1961 |
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