didrachm

[ dahy-dram ]
/ ˈdaɪˌdræm /

noun

a silver coin of ancient Greece equal to two drachmas.
Also di·drach·ma [dahy-drak-muh] /daɪˈdræk mə/.

Origin of didrachm

1540–50; < Late Latin didrāchmon < Greek dídrachmon worth two drachms. See di-1, drachma