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Of or having to do with an archduke or an archduchy.
[French archiducal, from archiduc, archduke; see archduke.]
(Government, Politics & Diplomacy) of or relating to an archduke, archduchess, or archduchy
arch•du•cal(ˈɑrtʃˈdu kəl, -ˈdyu-)
of or pertaining to an archduke or an archduchy.
[1655–65; < French archiducal]
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|Adj.||1.||archducal - belonging to or befitting an archduke or his archduchy|