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juvenal plumage

[joo-vuh-nl]
noun Ornithology.
  1. 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.
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Origin of juvenal plumage

< Latin juvenālis youthful, equivalent to juven(is) young man or woman + -ālis -al1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018