Illustrated Companion to the Latin Dictionary/Uncia

This article incorporates text from a publication now in the public domain: Rich, Anthony (1849). The illustrated companion to the Latin dictionary, and Greek lexicon. p. vi. OCLC 894670115. https://archive.org/details/illustratedcompa00rich. 

UN'CIA (οὐγκία). An ounce; the twelfth part of any whole; hence a copper coin of the Romans, equal in value to one-twelfth of an As. (Varro, L. L. v. 171.) Its value was denoted by a single ball, as in the annexed example (Uncia/1.1), from an original, reduced to one-third of the real size.

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  Uncia/1.1