exuviate
To shed or cast off a covering, especially a skin; to slough; to molt (moult).
rare
Like any arthropod encased in a rigid exoskeleton, a trilobite must periodically moult, or exuviate, in order to grow.
Where it comes from
From Latin exuviae (“what is shed”), from exuō (“cast off, strip”).
Adapted from the Wiktionary entry exuviate (CC BY-SA 4.0).