| 单词 | juvenal plumage |
| 释义 | juvenal plumage in American English ( ˈdʒuːvənl) noun Ornithology the first plumage of birds, composed of contour feathers, which in certain species follows the naked nestling stage and in other species follows the molt of natal down Word origin [‹ L juvenālis youthful, equiv. to juven(is) young man or woman + -ālis -al1] |
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