louis d'or

noun

lou·​is d'or ˌlü-ē-ˈdȯr 

plural louis d'or

1

: a French gold coin first struck in 1640 and issued up to the French Revolution (1789)

2

: the French 20-franc gold piece issued after the French Revolution

Word History

Etymology

French, from Louis XIII of France + d'or of gold

First Known Use

1665, in the meaning defined at sense 1