γαλακτὶς
From LSJ
τούτου δὲ συμβαίνοντος ἀναγκαῖον γίγνεσθαι πάροδον καὶ τροπὰς τῶν ἐνδεδεμένων ἄστρων → but if this were so, there would have to be passings and turnings of the fixed stars
English (LSJ)
πέτρα,
A = γαλακτίτης, Orph.L.201.
II γαλακτίς, ίδος, ἡ, = τιθύμαλλος, Aët.1.397.