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prealternate molt

[pree-awl-ter-nit]
noun Ornithology.
  1. the molt by which many birds replace only some and rarely all of the feathers assumed at the prebasic molt, usually occurring prior to breeding.
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Origin of prealternate molt

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018