Ecdysis (noun)
ek-die-sis
The process of shedding the old skin (in reptiles) or casting off the outer cuticle (in insects and other arthropods).
Mid 19th century: from Greek ekdusis, from ekduein ‘put off’, from ek- ‘out, off’ + duein ‘put’.
Example sentences
“At ecdysis, the animal sheds the old exoskeleton.”