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decagram or decagramme is equal to 10 gram (unit of mass), comes from a combination of the metric prefix deca (da) with the gram (g). Plural name is decagrams.
A pennyweight (abbreviated dwt or denarius weight) is a unit of mass that is equal to 24 grains, 1⁄20 of a troy ounce, 1⁄240 of a troy pound, approximately 0.054857 avoirdupois ounce and exactly 1.55517384 grams.