What is the meaning of Skrupel?

scruple, qualm

A Swedish unit of length at 29.7 µm, or 10 of a gran (grain; 0.297 mm).

A Swedish scruple at 1.237 g; 3 of a drakma (drachm; 3,711 g) or 20 gran (grain; 61.85 mg).

Source: wiktionary.org