Liddell-Scott-Jones

χαλκεῖον (chalkeion) a brass cauldron ^G:N-N

χαλκεῖον-εῖον,

Ionic dialect χαλκεῖον-ήϊον, τό, =[χαλκεῖονεία} 11, 5th c.BC: Herodotus Historicus 1.68, 5th c.BC: Hippocrates Medicus “περὶ ἄρθρων ἐμβολῆς” 47, 77, 5th-6th c.BC: Andocides Orator 1.40, 5th-6th c.BC: Plato Philosophus “Euthydemus” 300b ">Refs 5th c.BC+].

__II ={χαλκεῖονίον} (which see):
__II.1 cauldron, pot, [χαλκεῖονίον}), 5th c.BC: Hippocrates Medicus “περὶ νούσων” 4.39, 5th-6th c.BC: Plato Philosophus “Protagoras” 329a ">Refs 5th c.BC+] codices: especially copper in baths, [Refs 4th c.BC+]; χ. ἐρυθρόν vessel of pure copper, [Refs 5th c.BC+]
__II.2 concave metal reflector in a lamp, [Refs 5th c.BC+]
__II.3 bronze structure, [Refs 2nd c.AD+]
__III τὰ χαλκεῖονεῖα (i.e. ἱερά), at Athens, a festival at the end of the month Pyanopsion, [Refs 4th c.BC+]; title of play by Menander.