LATIN DICTIONARYLexicon Latīnum
proper noun · neutersecond declension

Ultraiectum

Ultraiectum n sg (genitive Ultraiectī)
Ecclesiastical[ul.traˈjɛk.tum]

Meaning

  1. Medieval LatinNew LatinneutersingularUtrecht (a city and municipality, the capital of Utrecht province, Netherlands)
    Anno Domini MCXXV. feria quinta post Pentecosten in Ultrajecto Henricus imperator moritur […]In the year of the lord 1125, on the Thursday after Pentecost, Emperor Henry died in Utrecht […]1688, Heinrich Meibom, Rerum Germanicarum Libri III, page 383:

Declension

declension
formsingularplural
nominativeUltraiectum—
genitiveUltraiectī—
dativeUltraiectō—
accusativeUltraiectum—
ablativeUltraiectō—
vocativeUltraiectum—
locativeUltraiectī—

Origins

Blend of ultra (“beyond”), a phonetic Latinisation of Old Dutch ūt (“out”) + Traiectum, the name of the ancient Roman fort at the city, from traiectus (“crossing”). See Dutch Utrecht.

Quick answers

What does Ultraiectum mean in Latin?
Ultraiectum, a proper noun, means “Utrecht (a city and municipality, the capital of Utrecht province, Netherlands)”.
What is the genitive of Ultraiectum?
The genitive singular is Ultraiectī. Ultraiectum is neuter, second declension.