Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A twelfth part, an ounce, or an inch.
  • n. An ounce.
  • n. A bronze coin minted during the Roman Republic, valued at one-twelfth of an as.
  • n. A numerical coefficient in a case of the binomial theorem.

from the GNU version of the Collaborative International Dictionary of English

  • n. A twelfth part, as of the Roman as; an ounce.
  • n. A numerical coefficient in any particular case of the binomial theorem.

from The Century Dictionary and Cyclopedia

  • n. In Roman antiquity, a twelfth part, as of the Roman as; an ounce; an inch; etc.
  • n. A copper coin of the ancient Roman republic, the twelfth part of the as. See as, 3.
  • n. A former name for the numerical coefficient of any term of the binomial theorem.

Etymologies

1685–95, from Latin uncia. Compare inch, ounce, Latin ūnus ("one"). (Wiktionary)

Examples

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  • The Roman ounce, equal to about 27.2875 grams of 0.9625 ounce avoirdupois. The word uncia means a one-twelfth part (there were 12 ounces in a Roman pound). The words "ounce" and "inch" are derived from it.

    November 7, 2007