*exuvia*

n. Capability of shedding the skin periodically. Craig. [ 1913 Webster ]

a. [ Cf. F. exuviable. ] Capable of being cast off in the form of exuviæ. [ 1913 Webster ]

‖ n. pl. [ L., fr. exuere to draw out or off, to pull off. ] 1. (Zoöl.) Cast skins, shells, or coverings of animals; any parts of animals which are shed or cast off, as the skins of snakes, the shells of lobsters, etc. [ 1913 Webster ]

2. (Geol.) The fossil shells and other remains which animals have left in the strata of the earth. [ 1913 Webster ]

a. Of or pertaining to exuviæ. “Exuvial layers.” “Exuvial deposits.” [ 1913 Webster ]

v. i. [ imp. & p. p. Exuviated, p. pr. & vb. n. Exuviating. ] ety>[ From Exuviae. ] (Zoöl.) To she [ 1913 Webster ]d an old covering or condition preliminary to taking on a new one; to molt.

There is reason to suppose that very old crayfish do not exuviate every year. Huxley. [ 1913 Webster ]