Last Updated
：2025/11/20
ostium
（ plural ）
Quizzes for review
A small opening or orifice, as in a body organ or passage. / Any of the small openings or pores in a sponge. / The mouth of a river.
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ostium
The surgeon carefully examined the ostium to ensure it was unobstructed.
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The surgeon carefully examined the ostium to ensure it was unobstructed.
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