μολύβδαινα
From LSJ
ἀλλ᾽ ἀμφὶ τοῖς σφαλεῖσι μὴ 'ξ ἑκουσίας ὀργὴ πέπειρα → to those who err in judgment, not in will, anger is gentle | men's wrath is softened toward those who have erred unwittingly
English (LSJ)
ἡ,
A piece of lead, used as the sink of a fishing-line, Il.24.80. 2 bullet, μ. χερμαδία Luc.Lex.5. 3 plumb in a mason's line, Poll.7.125, 10.147. II a metallic substance, prob. sulphuret of lead, galena, Hp.Mul.2.188, Arist.GA735b16, Dsc.5.85, Plin.HN34.173. III a plant, Plumbago europaea, ib. 25.155.