συγκέντρωσις
From LSJ
κάμψαι διαύλου θάτερον κῶλον πάλιν → bend back along the second turn of the race, turning the bend and coming back for the second leg of the double run, run the homeward course, retrace one's steps
English (LSJ)
εως, ἡ, Astron.,
A a simultaneous relation of centres, i.e. when the sun's centre is at that point of the ecliptic which rises, sets, or culminates coincidently with the rising, etc., of a given star, Ptol.Alm.8.5 (pl.).
