2 occurrences in 2 dictionaries
Reference: Drachma
Fausets
The DRACHMA is different, it was a Greek coin which the Roman DENARIUS (translated unfortunately "penny" Re 6:6, a laborer's daily wages Mt 20:2-9) superseded: Lu 15:8-9, "PIECE OF SILVER," Greek drachmee. (See PENNY.) The "penny," denarius, in metal was equivalent to 7 1/2 pence, but could purchase more than our shilling.
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Watsons
DRACHMA. The value of a common drachma was sevenpence, English. A didrachma, or double drachma, made very near half a shekel; and four drachmas made nearly a shekel.