noun.
The shedding of an outer integument or layer of skin, as by insects, crustaceans, and snakes; molting.
The Century Dictionary and Cyclopedia
noun.
The act of putting off, coming out of, or emerging; the act of shedding or casting an outer coat or integument, as in the case of serpents and certain insects, or the feathers of birds; the molt: opposed to endysis.
the GNU version of the Collaborative International Dictionary of English
noun.
The act of shedding, or casting off, an outer cuticular layer, as in the case of serpents, lobsters, etc.; a coming out; ; exuviation.