† aˌnaitioˈlogical,a.Obs.rare—1. [f.Gr. ἀν priv. + αἰτιολογία cause assigned + -ical. The reg. form would be anætiological.] (See quot.) 1652Gaule Magastrom. 81 Astrologicall [predictions]..being (as is their own word) anaitiologicall, or not having any naturall cause at all.