γαλακτὶς
From LSJ
καὶ παρὰ δύναμιν τολμηταὶ καὶ παρὰ γνώμην κινδυνευταὶ καὶ ἐν τοῖς δεινοῖς εὐέλπιδες → they are bold beyond their strength, venturesome beyond their better judgment, and sanguine in the face of dangers
English (LSJ)
πέτρα,
A = γαλακτίτης, Orph.L.201.
II γαλακτίς, ίδος, ἡ, = τιθύμαλλος, Aët.1.397.