Ecdysis
Ecdysis , noun
[New Latin, from Greek 'e`kdysis a getting out, from 'ekdy`ein, to put off; 'ek out + dy`ein to enter.]
(Biology) The act of shedding, or casting off, an outer cuticular layer, as in the case of serpents, lobsters, etc.; a coming out; as, the ecdysis of the pupa from its shell; exuviation.