pennyweight

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Hyphenation
pen•ny•weight
Definition from Glossary

1: a unit of mass in the Troy system used to measure precious metals and equivalent to 1.555 grams. Defined also as 24 grains in the p. and 12 p. in the Troy Oz. Abbr: dwt (from Latin denarius, a small silver coin). The abbreviation pwt is also sometimes seen in publications