LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Trinius

Trinius m sg (genitive Triniī or Trinī)
Classical[ˈtrɪ.ni.ʊs]Ecclesiastical[ˈtriː.ni.us]

Meaning

  1. masculinesingulara river in Samnium that flows into the Adriatic Sea near the town of Histonium, now the river Trigno

Declension

declension
formsingularplural
nominativeTrinius—
genitiveTriniī
Trinī		—
dativeTriniō—
accusativeTrinium—
ablativeTriniō—
vocativeTrinī—

In the Academy Smith's classical dictionaries

GeographyTriniusTrinius (Trigno), a considerable river of Samnium, which has its sources in the rugged mountain district between Agnone and Castel di Sangro, and has …

Quick answers

What does Trinius mean in Latin?
Trinius, a proper noun, means “a river in Samnium that flows into the Adriatic Sea near the town of Histonium, now the river Trigno”.
What is the genitive of Trinius?
The genitive singular is Triniī. Trinius is masculine, second declension.
How do you pronounce Trinius?
In classical Latin, [ˈtrɪ.ni.ʊs]; in ecclesiastical (church) Latin, [ˈtriː.ni.us].