grand duchess

grand-duchess的词性：
n.（名词）

1. The wife or widow of a grand duke.
大公夫人或大公的遗孀

2. A woman who is the sovereign of a grand duchy.
女大公：统治一个大公国的女人

3. The daughter or granddaughter of a czar in the male line.
沙皇父系的女儿或孙女

4. Used as the title for such a noblewoman.
用作这类贵妇的称号