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
acnŭa: or acna, ae, f. ἄκενα or ἄκαινα>,
I a measure or piece of land, 120 feet square, Varr. R. R. 1, 10; Col. 5, 1, 5; cf. Isid. Orig. 15, 15, 5.