英和和英

語源

From Latin impingere (“to dash against, impinge”).

発音

• IPA: /ɪmˈpækʃən/
• 韻: -ækʃən

名詞

impaction (countable and uncountable, plural impactions)

1. A compression; the packing together of loose matter.
2. Something packed together tightly; a mass of densely-packed matter.
3. (medicine, gastroenterology) A solid, immobile bulk of stool.
   • 2021, Alice A. Horton, Isobelle Blissett, Impacts of Plastic Pollution on Freshwater Aquatic, Terrestrial and Avian Migratory Species in the Asia and Pacific Region, Convention on Migratory Species, page 22:

     As plastics cannot be easily egested, these can accumulate within the stomach, causing impaction and leading ultimately to death.

4. (dentistry) The failure of a tooth to erupt into the dental arch, because of adjacent teeth, dense overlying bone, excessive soft tissue, or other factor.
5. (education) The situation where an institute, usually a college or university, receives more applications from qualified applicants than the number of spaces available, meaning that meeting the minimum admission requirements does not guarantee acceptance.

派生語