Hi! An academic article mentions that in ancient Greek "the chrysalis – which is the next stage of metamorphosis from a caterpillar – was called nekydallon, meaning “the shell of the dead”, and points the source of this information to Helios Encyclopaedical Lexicon, Geourgoulis, 1975. I could not find this source to check the word "nekydallon" and also did not find related vocabulary in the Liddel Scott. Did this word exist in ancient Greek? Any advice is welcome, and if with sources, even better. 