Definition of grand-ducal in English:

grand-ducal

adjective

  • Of or relating to a Grand Duke, Grand Duchess, or Grand Duchy.

Origin

Mid 18th century; earliest use found in The London Gazette. From grand + ducal, after Grand Duke.

Pronunciation

grand-ducal

/ˌɡran(d)ˈdjuːkl//ˌɡran(d)ˈdʒuːkl/