A Persian gold coin which is supposed to have obtained its name from the figure on the obverse of the Persian King Darius. They appear to have been originally issued by Darius I, the son of Hystaspes (B.C. 521-485). See Herodotus, Historia (iv. 166). The King is generally represented as a kneeling bowman, and consequently these coins are sometimes referred to as Archers (q.v.). The reverse bears an incuse punch-mark.
These coins are the ... of the Greeks, and in those parts of the Scriptures written after the Babylonish captivity, they are called Adarkonim. Ezra (viii. 26, 27), I Chron. (xxix. 7), and by the Talmudists, Darkonoth; Nehemiah (vii. 70-72). Conf. Hill, Historical Greek Coins (p. 27).
Source: Frey's Dictionary (American Journal of Numismatics, Vol. 50, 1916)