- A small opening or orifice, as with a body organ or passageway.
- Any of the small open positions or pores in a sponge.
- A small orifice or orifice, as in a body organ or passage.
- the small open positions or pores in a sponge.
- An opening; a passage.
- An opening or entry; a mouth; an os.
- In zoology: In sponges, the opening of an incurrent channel.
Sentence for "ostium"
Synonym for "ostium"
Cross Reference for "ostium"
Same Context for "ostium"