[ˌɑːtʃˈdjuːk], (Noun)

Definitions:
- a chief duke, in particular (formerly) the son of the Emperor of Austria
(e.g: the archduke of Austria was most concerned with the protection of Vienna)


Phrases:

Origin:
early 16th century: from Old French archeduc, from Merovingian Latin archidux, archiduc-, from archi- ‘chief’ + dux, duc- (see duke)