This is an uncertain variant reading in the printed edition. Other variants are אזלייהו, מזלייהו, parsed by Sokoloff for the CAL simply as the infinitive of אזל, i.e. "in motion" and hence omitted (by oversight?) in DJBA. See Jastrow, p. 755, s.v. מזלא.
LJLA hapax מדול is probably an error for מדלי; cf. Onqelos and Neofiti ad loc.