LATIN DICTIONARYLexicon Latīnum
noun · femininevariously declined, third declension, second declension

gaster

gaster f (genitive gasteris or gastrī)
Classical[ˈɡas.tɛr]Ecclesiastical[ˈɡas.ter]

Meaning

  1. the belly
  2. a big-bellied vessel
    Consternati nos insolentia ebriorum intentavimus oculos in proeliantes, notavimusque ostrea pectinesque e gastris labentia, quae collecta puer lance circumtulit.c. 27 CE – 66 CE, Petronius, Satyricon 70

Declension

declension
formsingularplural
nominativegastergasterēs
gastrī
genitivegasteris
gastrī
gasterum
gastrōrum
dativegasterī
gastrō
gasteribus
gastrīs
accusativegasterem
gastrum
gasterēs
gastrōs
ablativegastere
gastrō
gasteribus
gastrīs
vocativegastergasterēs
gastrī

gaster, tĕris, and tri, f., = γαστήρ,
I. the belly (pure Lat. venter).
I. Lit.: inflatio secundum gastera, Cael. Aur. Tard. 3, 8.—
II. Transf., a big-bellied vessel, Petr. 70; 79; Marc. Emp. 8 med.

Origins

Borrowing from Ancient Greek γᾰστήρ (găstḗr, “paunch, belly”).

Quick answers

What does gaster mean in Latin?
gaster, a noun, means “the belly; a big-bellied vessel”.
What is the genitive of gaster?
The genitive singular is gasteris. gaster is feminine, variously declined, third declension, second declension.
How do you pronounce gaster?
In classical Latin, [ˈɡas.tɛr]; in ecclesiastical (church) Latin, [ˈɡas.ter].