Etymologically

Etymology and origin of the Latin word semuncia

Confidence
Established
Formation
Compound
First attested
234–149 BC, Cato
Ultimate origin
Latin (ūncia)
Etymology tree
inherited borrowed derived
Latin uncia
English inch
Latin semuncia

Pronunciation

  • Classical: [seːˈmuːŋ.ki.a], [seːˈmʊŋ.ki.a][1]
  • Ecclesiastical: [seˈmun̠ʲ.t͡ʃi.a][1]

Forms

sēmū̆ncia f (genitive sēmū̆nciae); first declension[1]

Etymology

It is from Latin sēmi- (“half”) + ūncia (“a twelfth, ounce”).[2][1][3] Varro explains it as half of that unit.[2][4] De Vaan lists ūncia among the derivatives of ūnus (“one”), and traces the prefix to Proto-Indo-European *sēm-i (“in one”), whose meaning shifted to “half”.[5]

Earliest recorded meaning

The earliest instances the OLD cites are in Cato, who lists sēmunciae among the equipment of olive orchards and vineyards, an item it cannot identify;[2] Köbler records the word first in Varro.[3]

Semantic evolution

As a fraction of the Roman duodecimal system it meant one twenty-fourth of any whole: Cicero has an heir to eleven twelfths and a twenty-fourth, ex deunce et sēmunciā, and Pliny the Elder speaks of twenty-fourths of hours.[4] As a weight it was one twenty-fourth of a pound, half an ounce: Cicero has a praetor's ring made from in aurī sēmunciā, half an ounce of gold, and Livy reports a law that no woman should own more than half an ounce of gold.[2] As a coin it was one twenty-fourth of an as, and Asconius uses it hyperbolically of goods sold for next to nothing.[2]

Columella uses it for one twenty-fourth of a iugerum, and Tacitus, in the plural, of a rate of interest.[2] Persius uses it figuratively of the smallest amount, half an ounce of right.[2]

Timeline

  • 234–149 BC – Cato lists sēmunciae among farm equipment.[2][3]
  • 116–27 BC – Varro defines it as half an ūncia.[2][3]
  • 81–43 BC – Cicero uses it of half an ounce of gold and of a twenty-fourth share of an inheritance.[2][4]
  • 34–62 AD – Persius uses it figuratively of a minimal amount.[2]
  • 1st century AD – Columella uses it of a twenty-fourth of a iugerum.[2]
  • 98–115 AD – Tacitus uses the plural for a rate of interest.[2]

Meanings

Noun

  1. One twenty-fourth of anything.[2][4]
  2. A weight of one twenty-fourth of a libra, half an ounce;[2] (figurative) a minimal amount.[2]
  3. A coin worth one twenty-fourth of an as.[2]
  4. One twenty-fourth of a iugerum.[2]
  5. (plural) A rate of interest.[2]
  6. An unidentified item of equipment for olive orchards and vineyards.[2]

Word family

  • semuncialis
  • sēmunciārius

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o p q r s t Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  4. ^ a b c d Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  5. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
Cite this entry

“Semuncia.” Etymologically, 20 Oct. 2026, etymologically.com/la/semuncia. Accessed 20 Oct. 2026.

Last edited on . ·