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See also: Uncia and uncía



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


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uncia (plural unciae)

  1. (classical studies) A twelfth part, an ounce, or an inch.
  2. (pharmacy) An ounce.
  3. A bronze coin minted during the Roman Republic, valued at one-twelfth of an as.
  4. (algebra, obsolete) A numerical coefficient in a case of the binomial theorem.



From ūnus.



uncia f (genitive unciae); first declension

  1. The twelfth part of something; twelfth.
  2. The twelfth part of a pound, ounce.
  3. The twelfth part of a foot, inch.
  4. The twelfth part of a jugerum.
  5. (figuratively) A trifle, bit, atom.


First declension.

Case Singular Plural
nominative uncia unciae
genitive unciae unciārum
dative unciae unciīs
accusative unciam unciās
ablative unciā unciīs
vocative uncia unciae

Derived terms[edit]



  • uncia in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • uncia in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • uncia in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français [Illustrated Latin-French Dictionary], Hachette
  • uncia in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
  • uncia in William Smith et al., editor (1890) A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin
  • Ačaṙean, Hračʿeay (1977), “ունկի”, in Hayerēn armatakan baṙaran [Dictionary of Armenian Root Words] (in Armenian), volume III, 2nd edition, Yerevan: University Press, page 603a