σιαγών
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)
Ion. σῐηγών, όνος, ἡ,
A jaw-bone, jaw, Hp.Epid.3.17.β, S.Fr.112, Ar.Fr.287, PCair.Zen.76.12 (iii B.C.), LXXJd.15.14, al.; of an ox, Cratin.163; of a camel, prob. in PLond.3.909 (a).7(ii A.D.); κινεῖται δὲ τοῖς . . ζῴοις ἅπασιν ἡ κάτωθεν σ., κτλ., Arist.HA516a24, cf. 492b22; cheek, Cerc.5.6, Ev.Matt.5.39:—written συαγών, BGU 100.5 (ii A.D.), cf. Ath.3.94f; also σεαγών, BGU153.17,35 (ii A.D.), Sammelb.5167.11.
