LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Viadus

Viadus m sg (genitive Viadī)
Classical[ˈwi.a.dʊs]Ecclesiastical[ˈviː.a.dus]

Meaning

  1. masculinesingulara river in Germany, assumed to be the Oder

Declension

declension
formsingularplural
nominativeViadus—
genitiveViadī—
dativeViadō—
accusativeViadum—
ablativeViadō—
vocativeViade—

In the Academy Smith's classical dictionaries

GeographyViadusViadus (Οὐίαο͂ος), a river of Germany, west of the Vistula, mentioned by both Ptolemy (2.11.2) and Marcianus (p. 53) as flowing into the Mare Suevicum…

Quick answers

What does Viadus mean in Latin?
Viadus, a proper noun, means “a river in Germany, assumed to be the Oder”.
What is the genitive of Viadus?
The genitive singular is Viadī. Viadus is masculine, second declension.
How do you pronounce Viadus?
In classical Latin, [ˈwi.a.dʊs]; in ecclesiastical (church) Latin, [ˈviː.a.dus].