Definition of apothecaries' measure in English:

apothecaries' measure

(also apothecaries' weight)

noun

historical
  • [mass noun] Systems of units formerly used in pharmacy for liquid volume (or weight). They were based respectively on the fluid ounce (= 8 drachms or 480 minims) and the ounce troy (= 8 drachms or 24 scruples or 480 grains).