The Collaborative International Dictionary of English v.0.48:
Exuvial \Ex*u"vi*al\, a. Of or pertaining to exuvi[ae]. "Exuvial layers." "Exuvial deposits." [1913 Webster]WordNet (r) 3.0 (2006):
exuvial adj 1: of or relating to the cast-off skins or cuticles of various animals