Pennyweight
Defined in 3 dictionaries — Cyclopedic (1922), Bouvier (1914), Black's (1910)
The Cyclopedic Law Dictionary
Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
A troy weight which weighs twenty-four grains, or one-twentieth part of an ounce. PENSA "(Law Lat. from Lat. pendere, to weigh). In Old English Law. A weight. Ad pensam, by weight. The ancient way of paying into the exchequer as much money for a pound of sterling as weighed twelve ounces troy. Lowndes' Essay upon Coin, 4; Cowell. This was distinguished from payment de numero, by count. In Old Records. A wey (weigh) of P E N S I O ( Lat. from pewdere ). In the Civil Law. A payment, properly, for the use of a thing. Calv. Lex. A rent; a payment for the use and occupation of another's house. Calv. Lex.
Bouvier's Law Dictionary and Concise Encyclopedia
John Bouvier; revised by Francis Rawle · 1914
A troy weight of twenty-four grains, or one-twentieth part of an ounce. See Weights.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910