χαλκόδεσμος
From LSJ
αὐτὸν κέκρουκας τὸν βατῆρα τοῦ λόγου → you have struck the very threshold of the argument, you have struck the most important and chiefmost point
Greek Monolingual
-ον, Α
χαλκόδετος.
[ΕΤΥΜΟΛ. < χαλκ(ο)- + δεσμός (πρβλ. κεφαλόδεσμος, σιδηρόδεσμος)].
German (Pape)
= χαλκόδετος, Hesych.