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archdukedom

[ahrch-dook-duh m, -dyook-]
noun
  1. an archduchy.
  2. the office or rank of an archduke.
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Origin of archdukedom

First recorded in 1520–30; archduke + -dom
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018