adoptional,a.|əˈdɒpʃənəl|[f.prec.+ -al1.Cf.nation-al, etc.]Of or belonging to adoption.1861W. H. MillPantheist.Princ.(ed.2) 212Leaving them[the Evangelists]to describe severally the natural and the adoptional lines of this, and withholding the descent of the only true parent.