in insects and other arthropods. part of the metamorphosis process in which old skin is shed after a new skin (or cuticle) is formed.

Merriam-Webster Online Dictionary
molt (verb)
intransitive verb
transitive verb
to shed hair, feathers, shell, horns, or an outer layer periodically to cast off (an outer covering) periodically , specifically to throw off (the old cuticle) - used of arthropods
molt (noun)
the act or process of - molting , specifically - ecdysis
molt (Wikipedia)
A dragonfly in its radical final moult, metamorphosing from an aquatic nymph to a winged adult.

In biology, moulting (British English), or molting (American English), also known as sloughing, shedding, or in many invertebrates, ecdysis, is the manner in which an animal routinely casts off a part of its body (often, but not always, an outer layer or covering), either at specific times of the year, or at specific points in its life cycle.

Moulting can involve shedding the epidermis (skin), pelage (hair, feathers, fur, wool), or other external layer. In some groups, other body parts may be shed, for example, wings in some insects or the entire exoskeleton in arthropods.

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