An exuvia (plural exuviae) is the cast-off outer skin of an arthropod after a moult

In some species the exuvia is eaten soon after the moult although in other species it is left. For example, the exuviae of cicadas can often been seen on the surface of trees. In summer, it's often possible to see exuvia of dragonflies on plant stems near the water's edge.

The Latin word exuviae, meaning "things stripped from a body", is found only in the plural. Exuvia is a derived singular form, although this is a neologism, and not attested in texts by Roman authors.