aruzza

Not to be confused with the arruse

A unit of mass, conceptually the mass of a grain of rice, about 0.019 gram.

This unit is listed in Appendix 3 of Bruno Kisch’s Scales and Weights; we have not encountered it elsewhere. Because of the spelling and small size, and given Dr. Kisch’s special interest in pharmaceutical weights, it seems probable that this is a Spanish or Portuguese apothecary unit. Compare arroz.

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