pennyweight

[ pen-ee-weyt ]
/ ˈpɛn iˌweɪt /

noun

(in troy weight) a unit of 24 grains or 1/20 of an ounce (1.56 grams). Abbreviation: dwt, pwt

Origin of pennyweight

1350–1400; Middle English penyweight, Old English penega gewihte. See penny, weight
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for pennyweight

pennyweight

/ (ˈpɛnɪˌweɪt) /

noun

a unit of weight equal to 24 grains or one twentieth of an ounce (Troy)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012