δίαυλος

A. double pipe or channel: usu. in the race, double course, Pi. O. 13.37, E. El. 825, IG 22.957, al.; compared with recurrent nerves, Gal. UP 7.14.

b. δ. ἵππος, Hp. Vict. 2.63.

2. metaph., κάμψαι διαύλου θάτερον κῶλον πάλιν to run the homeward course, retrace one's 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; ἐκπεριτ ρέχειν διαύλους to run to and fro, Aristaenet. 1.27; of a wife's return to her husband, Anaxandr. 56.4.

II. strait, E. Tr. 435.

2. in pl., of air-passages, Opp. C. 2.181.