LATIN DICTIONARYLexicon Latīnum
numeralfirst/second-declension numeral with a first/second-declension numeral

quīntusdecimus

quīntusdecimus (feminine quīntadecima, neuter quīntumdecimum)
Classical[kʷiːn.tʊsˈdɛ.kɪ.mʊs]Ecclesiastical[kʷin.tuzˈdɛː.t͡ʃi.mus]

Meaning

  1. numeralfifteenth

Declension

singular
formmasculinefeminineneuter
nominativequīntusdecimusquīntadecimaquīntumdecimum
genitivequīntīdecimīquīntaedecimaequīntīdecimī
dativequīntōdecimōquīntaedecimaequīntōdecimō
accusativequīntumdecimumquīntamdecimamquīntumdecimum
ablativequīntōdecimōquīntādecimāquīntōdecimō
vocativequīntedecimequīntadecimaquīntumdecimum
plural
formmasculinefeminineneuter
nominativequīntīdecimīquīntaedecimaequīntadecima
genitivequīntōrumdecimōrumquīntārumdecimārumquīntōrumdecimōrum
dativequīntīsdecimīsquīntīsdecimīsquīntīsdecimīs
accusativequīntōsdecimōsquīntāsdecimāsquīntadecima
ablativequīntīsdecimīsquīntīsdecimīsquīntīsdecimīs
vocativequīntīdecimīquīntaedecimaequīntadecima

quintus-dĕcĭmus, a, um, num. adj.,
I. the fifteenth (class.): locus, Cic. Inv. 1, 54, 105: quintisdecimis castris, Liv. 45, 33 fin.: in libro quintodecimo, Gell. 1, 16, 11; often separately: quinto decimo Kal. Dec., Col. 11, 2, 88; and sometimes in reverse order: anno decimo quinto, Eutr. 1, 19.

Origins

  1. Proto-Indo-European*pénkʷe
  2. Proto-Indo-European*penkʷtós
  3. Proto-Italic*kʷenktos
  4. Latinquīntusdecimus

Latin quīntus Proto-Italic *dekəmos Latin decimus Latin quīntusdecimus From quīntus + decimus.

Quick answers

What does quīntusdecimus mean in Latin?
quīntusdecimus, a numeral, means “fifteenth”.
How do you pronounce quīntusdecimus?
In classical Latin, [kʷiːn.tʊsˈdɛ.kɪ.mʊs]; in ecclesiastical (church) Latin, [kʷin.tuzˈdɛː.t͡ʃi.mus].
Where does quīntusdecimus come from?
Proto-Indo-European *pénkʷe → Proto-Indo-European *penkʷtós → Proto-Italic *kʷenktos → Latin quīntusdecimus.