moult

moult
( molt)
verb
  1. [no obj.](of an animal) shed old feathers, hair, or skin, or an old shell, to make way for a new growth
    (动物)脱毛;蜕皮;脱壳;换羽
    the adult birds were already moulting into their winter shades of grey.
    成年鸟已开始换上冬天灰色的羽毛。
    [with obj.]the snake moults its skin.
    蛇蜕皮。
    ■(of hair or feathers) fall out to make way for new growth
    (毛,羽)脱去;蜕去
    the last of his juvenile plumage had moulted.
    他最后的雏鸟羽毛已蜕去了。
noun
  1. a loss of plumage, skin, or hair, especially as a regular feature of an animal's life cycle
    脱毛;蜕皮;换羽
语源
  1. Middle English moute, from an Old English verb based on Latin mutare 'to change'. For the intrusive -l-, compare with words such as fault
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