A unit of capacity or volume in the apothecary system equal to one eighth of a fluid ounce.
1To use the test, mix 1 fluid drachm of the reagent with 20 minims of urine, previously diluted to a standard specific gravity of 1.003.
2Three fluid drachms of the fluid extract were about equivalent to 3 grains of caffeine.
3Two fluid drachms of the poison (more than enough to produce death) were accidentally taken in my experience.
Translations for fluid drachm