[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
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
Middle English moute, from an Old English verb based on Latin mutare 'to change'. For the intrusive -l-, compare with words such as fault