As the gypsy moth caterpillar grows, it sheds the outer covering, called molting, at the end of each instar Gypsy moth caterpillars generally molt five times before they reach their full length
(moult) In a mammal, the act or process of shedding or casting off the hair, outer layer of skin, or horns; most mammals shed the hair once, twice, or three times annually The castoff covering (obsolete) As a verb; To be shed or to shed