LATIN DICTIONARYLexicon Latīnum
noun · masculinesecond declension

cētus

cētus m (genitive cētī)
Classical[ˈkeː.tʊs]Ecclesiastical[ˈt͡ʃɛː.tus]

Meaning

  1. Any large sea-animal, such as a whale, shark, seal, dogfish, dolphin, or tuna, or a sea monster.
  2. The constellation Cetus, the Whale

Latīnē defined in Latin in our graded readers

Declension

declension
formsingularplural
nominativecētuscētī
genitivecētīcētōrum
cētōn
dativecētōcētīs
accusativecētumcētōs
ablativecētōcētīs
vocativecētecētī

cētus, i, m. (acc. to the Gr. cētŏs, n., Plin. 32, 1, 4, § 10; and hence common in the plur. cētē = κήτη, Verg. A. 5, 822; Plin. 9, 24, 40, § 78; 9, 50, 74, § 157; Sil. 7, 476), = κῆτος,
I. any large sea-animal, a seamonster; particularly a species of whale, a shark, dog-fish, seal, dolphin, etc., Plin. l. l.; Plaut. Aul. 2, 8, 5; id. Capt. 4, 2, 72; Cels. 2, 18.—
II. As a constellation, the Whale, Vitr. 9, 7; Manil. 1, 612.

Origins

Borrowed from Ancient Greek κῆτος (kêtos, “any sea-monster or huge fish”).

Quick answers

What does cētus mean in Latin?
cētus, a noun, means “Any large sea-animal, such as a whale, shark, seal, dogfish, dolphin, or tuna, or a sea monster.; The constellation Cetus, the Whale”.
What is the genitive of cētus?
The genitive singular is cētī. cētus is masculine, second declension.
How do you pronounce cētus?
In classical Latin, [ˈkeː.tʊs]; in ecclesiastical (church) Latin, [ˈt͡ʃɛː.tus].