"pertaining to or of the nature of exuviae," 1630s; see exuviae + -al (1).
Entries linking to exuvial
exuviae n.
"cast-off skins, shells, or other coverings of animals," 1650s, Latin, literally "that which is stripped off," hence "slough, skin," also "clothing, equipment, arms, booty, spoils," from stem of exuere "to doff," from ex "off" (see ex-) + from PIE root *eu- "to dress" (also found in Latin induere "to dress," reduvia "fragment").
-al 1
suffix forming adjectives from nouns or other adjectives, "of, like, related to, pertaining to," Middle English -al, -el, from French or directly from Latin -alis (see -al (2)).