grand duchy
noun
: the territory or dominion of a grand duke or grand duchess
Example Sentences
Recent Examples on the Web Europe has 12 remaining monarchies, including three principalities and a grand duchy. 
Helen Lewis, The Atlantic, 12 Apr. 2022
Helen Lewis, The Atlantic, 12 Apr. 2022 Word History
First Known Use
1669, in the meaning defined above
- three-seeded mercury
- three-spined stickleback
- three-spot
- three-spot gourami
- three-square
- three-square rush
- three-step
- three-striper
- three-syllable law
- three-tailed porgy
- three-thorned acacia
- three-throw
- three-toed plover
- three-toed sloth
- three-toed woodpecker
- three-toes
- three-toothed cinquefoil
- three-valued
- three-volumer
- three-way
- three-way bulb
- three-way cross
- three-way lamp
- three-way switch
- three-wheeler