pennyweight

(penē wāt′)

noun

a unit of weight, equal to ounce troy or 24 grains (1.5552 grams): abbrev. pwt

See pennyweight in American Heritage Dictionary 4

noun Abbr. dwt. or pwt.
A unit of troy weight equal to 24 grains, 1/20 of a troy ounce or approximately 1.555 grams.

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