du·cal /ˈdukəl ||ˈdju-/ (a.)公爵的,象公爵的,公爵領地的
Du·cal a. Of or pertaining to a duke. His ducal cap was to be exchanged for a kingly crown. --Motley. ◄ ►
ducal adj : of or belonging to or suitable for a duke; "ducal palace"