molt

This term describes a biological necessity of renewal, evoking an image of shedding the old to accommodate growth. It is primarily used in zoological contexts, specifically regarding birds, reptiles, and insects, where the process is often cyclical and tied to seasonal changes or developmental stages.

When used as a noun, it refers to the specific period or the physical act of shedding. While the verb can be used transitively to describe the object being shed, it is frequently used intransitively to describe the state of the animal undergoing the transformation.