archducal

詳細解釋：

arch.du.cal

adj.（形容詞）
Of or having to do with an archduke or an archduchy.
大公爵的：大公爵或大公爵領地的或與之有關的

來源：
French archiducal
法文 archiducal
from archiduc [archduke] * see archduke
源自 archiduc [大公爵] *參見 archduke