"scruple : (obsolete) A weight of twenty grains or one third of a dram, in England about 1.3 grams..."

“scruple : (obsolete) A weight of twenty grains or one third of a dram, in England about 1.3 grams (symbol: ℈).
(obsolete) Hence, a very small quantity; a particle.
(obsolete) A doubt or uncertainty concerning a matter of fact; intellectual perplexity.
Hesitation to act from the difficulty of determining what is right or expedient; doubt, hesitation or unwillingness due to motives of conscience.
A Hebrew unit of time equal to 1⁄1080 hour.”

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