the GNU version of the Collaborative International Dictionary of English
n. A two-drachma piece; an ancient Greek silver coin, worth nearly forty cents.
The Century Dictionary and Cyclopedia
n. A silver coin of ancient Greece, of the value of two drachmæ.
Word Usage
"And then the words of those that collected the tribute, "Does not your master pay the didrachm?" seem to sound to this effect, "Is your master of the sect of Judas of Galilee?""