|Noah Webster's Dictionary|
(n.) A two-drachma piece; an ancient Greek silver coin, worth nearly forty cents.
Int. Standard Bible Encyclopedia
di-drak'-ma: Two drachmas.
See DRACHMA, DRAM.
Didrachma (1 Occurrence)
Matthew 17:24 When they had come to Capernaum, those who collected the didrachma coins came to Peter, and said, "Doesn't your teacher pay the didrachma?" (WEB DBY)