ὑπόχαλκος
From LSJ
ὅσα ἦν νενοσσευμένα ὀρνίθων γένεα → as many species of birds as had their nests, all the other kinds of birds which had been hatched
English (LSJ)
ον,
A containing a mixture of copper, Pl.R.415b; κανοῦν χρυσοῦν ὑπόχαλκον bronze gilt, IG22.1407.21; ὑπόχαλκον δέ σου τὸ χρυσίον Com.Adesp. (?) ap.Suid. s.v. ὑπόχαλκον: metaph., Plu.2.1b, 65a: cf. ὑπάργυρος, etc. 2 sounding like copper, ὑ. ἠχὼ φέρειν Philostr.VA3.8. 3 of a copper colour, ζῷον ὑπόχαλκον τὴν μορφήν (sc. the οἶστρος or μύωψ) Sch.Od.22.299.
German (Pape)
[Seite 1239] unten von Kupfer, Plat. Rep. III, 415 b; bes. von Münzen, die von Kupfer u. versilbert oder vergoldet sind, dah. übh. unächt, verfälscht, Plut. ed. lib. 2, mit κίβδηλος verbunden.