A.alternation : overlapping of broken bones, Hp.Fract.15 (pl.); ἡ π. τοῦ ὀστέου ib.35 ; “π. ἔχειν πρὸς ἄλληλα καὶ συμπλοκήν” Thphr.Sens.66.
II. change, deviation, mutation, Pl.Ti.22d, cf. Plt.269e, Placit.1.7.33 (pl.); “διαστροφὴ μεγάλη καὶ π. τῆς γωνίας” Plu.2.93 oa ; παραλλάξιες φρενῶν mental aberrations, Hp.Acut.(Sp.)1.
2. Astron., parallax, Ptol.Alm.5.11, 9.1, Procl.Hyp.4.53, al.