Pennyweight

noun

Definitions

Noun
  1. 1
    A unit of mass equal to 24 grains, or ¹⁄₂₀ of a troy ounce.
  2. 2
    a unit of apothecary weight equal to 24 grains wordnet

Etymology

From Middle English penyweight; equivalent to penny + weight: it was the weight of a silver penny (¹⁄₂₄₀ of a pound).

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