ostium

Borrowed from Latin ōstium.

ostium (plural ostia)

1. A small opening or orifice, as in a body organ or passage.
2. Any of the small openings or pores in a sponge.
3. The mouth of a river.

• timous

Cognate with ōs (“mouth”).

• (Classical) IPA^(key): /ˈoːs.ti.um/, [ˈoːs.ti.ũ]
• (Ecclesiastical) IPA^(key): /ˈos.ti.um/

ōstium n (genitive ōstiī); second declension

1. door
2. entrance
3. estuary

Second declension.

• (door): iānua

• ōstiātim

• ōstiārius
• ōstiolum

• ostium in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• ostium in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• ostium in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
• ostium in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français, Hachette
• Carl Meissner; Henry William Auden (1894) Latin Phrase-Book‎, London: Macmillan and Co.
  • to knock at the door: ostium, fores pulsare
    
  • to open, shut the door: ostium, fores aperire, claudere
    
• ostium in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
• ostium in William Smith et al., editor (1890) A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin