Libra
Libra the unit of weight among the Romans and Italians. The libra or pound of copper was also the unit of value, and was called As (q. v.). The weight of the libra has been fixed by metrologists as 5050 grains (327.5 grammes), nearly 12 ounces avoirdupois. It was divided into twelve unciae or ounces. For further details, see As, Vol. 1. p. 202, and PONDERA
From William Smith (ed.), Dictionary of Greek and Roman Antiquities. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.