δίαυλος · diaulos — LSJ
double pipe, channel, double course, recurrent
double pipe or channel: usu. in the race, double course, Pi. O. 13.37, E. El. 825, IG 2(2).957, al.; compared with recurrent nerves, Gal. UP 7.14.
b
δ. ἵππος, Hp. Vict. 2.63.
2 homeward course, ebb and flow, rise and fall, return, to and fro, return
metaph., κάμψαι διαύλου θάτερον κῶλον πάλιν to run the homeward course, retrace oneʼs steps, A. Ag. 344; δίαυλοι κυμάτων ebb and flow, rise and fall of the waves, E. Hec. 29; εἰς αὐγὰς πάλιν ἁλίου δισσοὺς ἂν ἔβαν διαύλους they would twice return, Id. HF 662 (lyr.), cf. 1102; τὸν ὕστατον τρέχων δ. τοῦ βίου Alex. 235; ἐκπεριτρέχειν διαύλους to run to and fro, Aristaenet. 1.27; of a wifeʼs return to her husband, Anaxandr. 56.4.
II strait
strait, E. Tr. 435.
2 air-passages
in pl., of air-passages, Opp. C. 2.181.