apolysis

apolysis (noun; Greek apo, away; lysis, loosen): 1. (Arthropoda) The first process of molting, characterized by the detachment of the old cuticle from the underlying hypodermal (epidermal) cells

See also: ecdysis. 2. (Platyhelminthes: Cestoda) The detachment of a gravid proglottid in tapeworms.