noun
Medical term for a surgically created opening, such as a colostomy or tracheostomy. Also used in anatomy for natural small openings.
See also: ストーマ
大腸がんの手術後、腹部に小孔（ストーマ）が造設された。
After colon cancer surgery, a stoma was created on the abdomen.
noun
ostiole (botany)
Botanical term for a small pore or opening, especially in fungi or certain plants.
菌類の子実体には小孔と呼ばれる胞子を放出する穴がある。
The fruiting body of fungi has openings called ostioles that release spores.