The ecdysis of a mealworm.
ecdysis definition by Webster's New World
Origin: Modern Latin ; from Classical Greek ekdysis, a stripping ; from ekdyein, to strip off ; from ek-, out of plush dyein, to enter
ecdysis definition by American Heritage Dictionary
noun pl. ec·dy·ses
Origin: Greek ekdusis, a stripping off, from ekduein, to take off : ek-, out, off; see ecto- + duein, to put on.