impaction
/ɪmˈpækʃən/ noun
Forms impactions
- noun A compression; the packing together of loose matter.
- noun Something packed together tightly; a mass of densely-packed matter.
- noun (medicine, gastroenterology) A solid, immobile bulk of stool.
- noun (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.
- noun (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.
Synonyms
Etymology
From Latin impingere (“to dash against, impinge”).
Webster’s 1913
- noun The driving of one fragment of bone into another so that the fragments are not movable upon each other; as, impaction of the skull or of the hip.
- noun An immovable packing; (Med.), a lodgment of something in a strait or passage of the body; as, impaction of the fetal head in the strait of the pelvis; impaction of food or feces in the intestines of man or beast.
Etymology [L. impactio a striking : cf. F. impaction.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “impaction”, CC BY-SA 4.0. Details