archdukedom

[ ahrch-dook-duh m, -dyook- ]
/ ˈɑrtʃˈduk dəm, -ˈdyuk- /

noun

an archduchy.
the office or rank of an archduke.

Origin of archdukedom

First recorded in 1520–30; archduke + -dom
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019