Source : Webster's Revised Unabridged Dictionary (1913)

Drachm \Drachm\, n. [See {Drachma}.]
   1. A drachma.

   2. Same as {Dram}.

Source : WordNet®

drachm
     n 1: a unit of apothecary weight equal to an eighth of an ounce
          or to 60 grains [syn: {dram}, {drachma}]
     2: a British imperial capacity measure (liquid or dry) equal to
        60 minims or 3.5516 cubic centimeters [syn: {fluidram}, {fluid
        dram}, {fluid drachm}]
     3: a unit of capacity or volume in the apothecary system equal
        to one eighth of a fluid ounce [syn: {fluidram}, {fluid
        dram}, {fluid drachm}]