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Distributive form of octō ‎(eight)



octōnī m ‎(feminine octōnae, neuter octōna); first/second declension

  1. eight at a time, by eights, eight each
    • 100 BCE – 44 BCE, Julius Caesar, Commentarii de Bello Gallico 7.73
      Huius generis octoni ordines ducti ternos inter se pedes distabant.
      Rows by eights of this kind were dug, they stood apart three feet between them.
    • c. 15 BCE, Vitruvius, De architectura 3.1
      Pseudodipteros autem sic collocatur, ut in fronte et postico sint columnae octonae, in lateribus cum angularibus quindenae.
      The Pseudodipteros, however, is thus assembled so that there are eight columns each in front and rear, fifteen each on the sides including the corner ones.
    • 1611 CE, Johannes Kepler, Strena seu de nive sexangula 20
      Etenim si cubo adimas angulos suos octonos resectos lateribus aequalibus, introrsumque componas plane constitues octaedron.
      Moreover if you remove from a cube its eight corners each cut on equal sides, and arrange them facing inwards, you will clearly produce an octahedron.


First/second declension.

Number Plural
Case / Gender Masculine Feminine Neuter
nominative octonī octonae octona
genitive octonōrum octonārum octonōrum
dative octonīs octonīs octonīs
accusative octonōs octonās octona
ablative octonīs octonīs octonīs
vocative octonī octonae octona

Derived terms[edit]


  • octoni” in Charlton T. Lewis & Charles Short, A Latin Dictionary, Oxford: Clarendon Press, 1879.