θῆξις
From LSJ
ἔκστασίς τίς ἐστιν ἐν τῇ γενέσει τὸ παρὰ φύσιν τοῦ κατὰ φύσιν → what is contrary to nature is any developmental aberration from what is in accord with nature (Aristotle, On the Heavens 286a19)
English (LSJ)
εως, ἡ,
A = ῥοπή, στιγμή, τάχος, Hsch.; θήξει, = Lat. momento, Gloss.; but κατὰ θῆξιν is f.l. for κατὰ θίξιν in Archig. ap. Gal.12.577.
German (Pape)
[Seite 1208] ἡ, das Wetzen, Schärfen, Sp.