Latin

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Latin numbers (edit)
 ←  12 XIII
13
14  → [a], [b]
    Cardinal: trēdecim
    Ordinal: tertiusdecimus, tertius decimus
    Adverbial: terdeciēs, terdeciēns, trēdeciēs, trēdeciēns
    Proportional: terdecuplus, trēdecuplus
    Multiplier: terdecuplex, trēdecuplex
    Distributive: terdēnus
    Fractional: tertiusdecimus, tertius decimus

Etymology

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From tredecim (thirteen).

Numeral

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tertius decimus (feminine tertia decima, neuter tertium decimum); first/second-declension numeral with a first/second-declension numeral

  1. thirteenth

Declension

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First/second-declension adjective with a first/second-declension adjective.

Number Singular Plural
Case / Gender Masculine Feminine Neuter Masculine Feminine Neuter
Nominative tertius decimus tertia decima tertium decimum tertiī decimī tertiae decimae tertia decima
Genitive tertiī decimī tertiae decimae tertiī decimī tertiōrum decimōrum tertiārum decimārum tertiōrum decimōrum
Dative tertiō decimō tertiō decimō tertiīs decimīs
Accusative tertium decimum tertiam decimam tertium decimum tertiōs decimōs tertiās decimās tertia decima
Ablative tertiō decimō tertiā decimā tertiō decimō tertiīs decimīs
Vocative tertie decime tertia decima tertium decimum tertiī decimī tertiae decimae tertia decima