[ad. earlier F. archeduché:—L. *archidūcātus: see ARCH- 4 and DUCHY.] The territory subject to an archduke.
1680. Morden, Geogr. Rect. (1685), 122. The only Arch-Dutchy in Europe is Austria.
1837. Penny Cycl., IX. 446/1. The Provinces of the Ens constitute the archduchy of Austria.
