adarme

adarme, Spanish dram (a traditional unit of mass equivalent to about 1.8 g); adarme, peso (a former Spanish coin and unit of currency notionally equivalent to an adarme of gold); bit, ounce (any insignificantly small weight or amount of anything)

Borrowed from Andalusian Arabic الدرهم (ad-dárham), from Arabic دِرْهَم (dirham, “dirham”), from Middle Persian 𐭦𐭥𐭦𐭭 (drahm), from Ancient Greek δραχμή (drakhmḗ, “drachma”). Doublet of dracma and dírham.