σάρος
From LSJ
ἆρά γε λόγον ἔχει δυοῖν ἀρχαῖν, ὑλικῆς τε καὶ δραστικῆς → does it in fact have the function of two principles, the material and the active?
English (LSJ)
or σαρός, ὁ, a Babylonian
A cycle of years (3600), Abyd.1, cf. Hsch. 2 Babylonian cycle of 222 months, Suid.