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in the PONS Dictionary

ōstium <ī> nt (os¹)

1.

ostium
Tür [ carceris ]
ostium crepuit

2. übtr

ostium
Eingang, Zugang [ portūs; Oceani Straße v. Gibraltar ]

3.

ostium
Mündung eines Flusses [ Tiberinum ]

4. nachkl. MED

ostium
Declension of ōstium
Case Singular Plural
Nominative ōstium ōstia
Genitive ōstiī ōstiōrum
Dative ōstiō ōstiīs
Accusative ōstium ōstia
Ablative ōstiō ōstiīs
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