pennyweight

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pennyweight:

see English units of measurementEnglish units of measurement,
principal system of weights and measures used in a few nations, the only major industrial one being the United States. It actually consists of two related systems—the U.S.
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pennyweight

[′pen·ē‚wāt]
(mechanics)
A unit of mass equal to ¹⁄₂₀ troy ounce or to 1.55517384 grams; the term is employed in the United States and in England for the valuation of silver, gold, and jewels. Abbreviated dwt; pwt.
References in periodicals archive ?
There are categories for heaviest `twins' (that's two on the same stalk), heaviest `triplets' (three on the same stalk) and the heaviest plate of a dozen berriesDating back to 1809, the weight of each gooseberry is carefully recorded in pennyweights and grains.
But, despite its monster size, his Edith Cavell berry of 36 pennyweights two grains was pushed off the scales by Peter's upstart.
weight, returning to the sterling standard of 11 ounces, 2 pennyweights