noun, plural un·ci·ae [uhn-shee-ee] /ˈʌn ʃiˌi/.

a bronze coin of ancient Rome, the 12th part of an as.
(in prescriptions) an ounce of weight or volume.

Origin of uncia

1685–95; < Latin: a twelfth part, akin to ūnus one; cf. inch1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for unciae


Examples from the Web for unciae

Historical Examples of unciae

  • Another way is to take two unciae of ore, a semi-uncia of litharge, two drachmae of Venetian glass and a semi-uncia of saltpetre.

    De Re Metallica

    Georgius Agricola

  • These "thorns" are apparently fairly rich, four unciae to the centumpondium being equivalent to about 97 ozs.

    De Re Metallica

    Georgius Agricola

  • The Romans commonly used fractions with denominator 12; these were described as unciae (ounces), being twelfths of the as (pound).