A small unit of weight or mass used historically in Spain and Spanish America, roughly equivalent to 1.8 grams.
From Spanish 'adarme', derived from Arabic 'dirham', which itself came from the Greek 'drachma'—showing how trade and conquest spread measurement systems.
The adarme shows how fragmented measurement was before metric standardization—different regions used different tiny weights for precious substances like spices and medicines, making commerce wonderfully confusing.
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