archduke
Concise Oxford English Dictionary © 2008 Oxford University Press:
archduke/ɑːtʃˈdjuːk/
▶noun a chief duke, in particular (historical) the son of the Emperor of Austria.
– derivatives
archducal adjective,
archduchy noun.
archducal adjective,
archduchy noun.
'archduke' also found in these Oxford entries:

