antidromal,a.Bot.|ænˈtɪdrəməl| [f.Gr. ἀντί against + -δροµ-ος running + -al1. Cf.Gr. ἀντιδροµέειν to run against.] = next. 1849Lindley Elem.Bot. ii. ix, Antidromal, when the direction of the spire of a lateral organ is the reverse of that on the central stem.