LATIN DICTIONARYLexicon Latīnum
adjectivefirst/second-declension adjective

trietericus

trietericus (feminine trieterica, neuter trietericum)

Meaning

  1. adjectiveof three years
  2. adjectivebiennial; i.e., according to Roman timekeeping, inclusive of the years before and after
    [...] quālīs commōtīs excitā sacrīs Thȳias, ubi audītō stimulant trietērica Bacchō… excited by the sorts of sacred objects shaken by Thyia, [as] when [such sounds are] heard they incite Bacchus’ biannual orgies, and Mount Cythaeron harkens with cries in the night.29 BCE – 19 BCE, Vergilius, Aeneis 4.301–303

Declension

singular
formmasculinefeminineneuter
nominativetrietericustrietericatrietericum
genitivetrietericītrietericaetrietericī
dativetrietericōtrietericaetrietericō
accusativetrietericumtrietericamtrietericum
ablativetrietericōtrietericātrietericō
vocativetrietericetrietericatrietericum
plural
formmasculinefeminineneuter
nominativetrietericītrietericaetrieterica
genitivetrietericōrumtrietericārumtrietericōrum
dativetrietericīstrietericīstrietericīs
accusativetrietericōstrietericāstrieterica
ablativetrietericīstrietericīstrietericīs
vocativetrietericītrietericaetrieterica

trĭĕtērĭcus, a, um, adj., = τριετηρικός,
I. recurring every three years, triennial: sacra, the festival of Bacchus, Ov. M. 6, 587; also called trieterica orgia, Verg. A. 4, 302. —As subst.: trĭĕtērĭca, ōrum, n., the festival of Bacchus, Ov. R. Am. 593; Stat. Th. 2, 661; id. Achill. 1, 595; Hyg. Fab. 131; cf. trieteris.

Quick answers

What does trietericus mean in Latin?
trietericus, a adjective, means “of three years; biennial; i.e., according to Roman timekeeping, inclusive of the years before and after”.