Ducat (?), n. [F. ducat, It. ducato, LL. ducatus, fr. dux leader or commander. See Duke.] A coin, either of gold or silver, of several countries in Europe; originally, one struck in the dominions of a duke.
[1913 Webster]

&hand_; The gold ducat is generally of the value of nine shillings and four pence sterling, or somewhat more that two dollars. The silver ducat is of about half this value.
[1913 Webster]