出典:Wiktionary
Borrowed from Latin vomitōrium (“entrance to an amphitheatre”), substantive of vomitōrius (“emetic, provoking vomiting”), from vomō (“vomit”).
vomitorium (複数形 vomitoria または vomitoriums)

Substantive of vomitōrius (“emetic", "provoking vomiting”), from vomō (“vomit”).
Second-declension noun (neuter).
| Case | Singular | Plural |
|---|---|---|
| Nominative | vomitōrium | vomitōria |
| Genitive | vomitōriī vomitōrī1 |
vomitōriōrum |
| Dative | vomitōriō | vomitōriīs |
| Accusative | vomitōrium | vomitōria |
| Ablative | vomitōriō | vomitōriīs |
| Vocative | vomitōrium | vomitōria |