unit of weight in the apothecaries' system, equal to 20 grains, or 1/3 dram, and equivalent to 1.295 grams. In ancient times, when coinage weights customarily furnished the lower subdivisions of weight systems, the scruple (from Latin scrupulus, small stone, or pebble) was a unit of Roman commercial weight as well as a unit of coinage weight. One drachma, the basic Greek silver unit, consisted of three scruples.
SCRUPLE
Meaning of SCRUPLE in English
Britannica English vocabulary. Английский словарь Британика. 2012