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

tertius decimus

tertius decimus (feminine tertia decima, neuter tertium decimum)

Meaning

  1. numeralthirteenth

Declension

singular
formmasculinefeminineneuter
nominativetertius decimustertia decimatertium decimum
genitivetertiī decimītertiae decimaetertiī decimī
dativetertiō decimōtertiae decimaetertiō decimō
accusativetertium decimumtertiam decimamtertium decimum
ablativetertiō decimōtertiā decimātertiō decimō
vocativetertie decimetertia decimatertium decimum
plural
formmasculinefeminineneuter
nominativetertiī decimītertiae decimaetertia decima
genitivetertiōrum decimōrumtertiārum decimārumtertiōrum decimōrum
dativetertiīs decimīstertiīs decimīstertiīs decimīs
accusativetertiōs decimōstertiās decimāstertia decima
ablativetertiīs decimīstertiīs decimīstertiīs decimīs
vocativetertiī decimītertiae decimaetertia decima

Origins

From tredecim (“thirteen”).

Quick answers

What does tertius decimus mean in Latin?
tertius decimus, a numeral, means “thirteenth”.