1. χέλειον · cheleion — Beekes
χέλειον [η.] ‘tortoise shell’ (Nic., H.), χελεύς: κιθάρα (H.). With a different stem χελώνη [f.] ‘tortoise (shell)’ (h. Merc.+), metaph. of many tortoise-like objects, especially a wooden shield cover of siege-troops, Lat. testidé (X., Plb., etc.), As a first member in Χελωνο-φάγοι [m.pl.] EN (Str, D. S., Plin.), also = ἀετοί τινες (H.). Thence 1. χελών-ιον [n.] ‘tortoise shell’ (Arist.), often metaph., e.g. ‘cover … — [Beekes, s.v. χέλειον, p. 1675]