ἐπιθόρνυμαι
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)
A cover, of the male, βουσί Luc.Am.22, etc.; ἐ. ταῖς γεγαμημέναις Philostr.V A5.29, cf. Im.2.3: abs., Ael.N A10.2, al.