What does sciūrus mean in Latin?

sciūrus, a noun, means “squirrel”.

What is the genitive of sciūrus?

The genitive singular is sciūrī. sciūrus is masculine, second declension.

In classical Latin, [skiˈuː.rʊs]; in ecclesiastical (church) Latin, [ʃiˈuː.rus].

noun · masculinesecond declension

sciūrus m (genitive sciūrī)

Classical[skiˈuː.rʊs]Ecclesiastical[ʃiˈuː.rus]

scĭūrus, i, m., = σκίουρος,

I. a squirrel, Plin. 8, 38, 58, § 138; 11, 43, 99, § 245; Mart. 5, 37, 13.

Borrowed from Ancient Greek σκίουρος (skíouros, “squirrel”), from σκιά (skiá, “shadow”) + οὐρά (ourá, “tail”).

Elsewhere

Old Occitan