/mōlt/
Noun
1. The skin or feathers cast off during the process of molting. (wiktionary.org)
2. A loss of plumage, skin, or hair, esp. as a regular feature of an animal’s life cycle. (Google Dictionary)
3. Periodic shedding of the cuticle in arthropods or the outer skin in reptiles. (wordnetweb.princeton.edu)
Verb
1. To shed hair, feathers, skin, horns etc. and replace it by a fresh layer. (wiktionary.org)
2. To cast off feathers, hair, or cuticle; to undergo ecdysis. (biology-online.org)
3. To shed in such a manner. (wiktionary.org)
4. To shed periodically part or all of a coat or an outer covering, such as feathers, cuticle, or skin, which is then replaced by a new growth. (The American Heritage® Dictionary of the English Language)
Word origin: From Old English *mutian “to change” (cf. bemutian “to exchange”), from Latin mutare “to change”