Definitions

1. noun

the process of shedding or casting off a skin or outer covering, especially by an insect or reptile, to reveal a new skin underneath

“The caterpillar underwent a moult before emerging as a butterfly.”

2. verb

to shed or cast off a skin or outer covering, especially by an insect or reptile, to reveal a new skin underneath

“The young frog moults several times before reaching adulthood.”