In Persia and later Iran , ? — 20th¹ centuries, a unit of mass, approximately 48.32 milligrams. Conceptually the mass of a grain of wheat. Also romanized as gändom. See also gon.
In Iran, the metrication law of 31 May 1926 fixed it at = 50 milligrams = ¹⁄₂₀th of a derham.
1. United Nations, 1966.
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