D defs.my
Entry 1 sense Webster, 1913

Louis d'or

/lo͞o'-ĭs dôr/ · Lou·is d'or · IPA /ˌlui ˈdɔɹ/
01 n. Formerly, a gold coin of France nominally worth twenty shillings sterling, but of varying value; -- first struck in 1640.
  1. 1.
    Formerly, a gold coin of France nominally worth twenty shillings sterling, but of varying value; -- first struck in 1640.