Last Updated：2025/11/20

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

Source Word

ostium

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.

Japanese Meaning

（体内の）小さな開口部・孔 / （海綿状のものに見られるような）小さな孔 / 河口

The surgeon carefully examined the ostium to ensure it was unobstructed.

外科医は、その小さな開口部が詰まっていないことを確認するために注意深く調べた。

Sense（1）

A small opening or orifice, as in a body organ or passage.

Sense（2）

Any of the small openings or pores in a sponge.

Sense（3）

The mouth of a river.

ostia

（ plural ）