impactions

/IH0 M P AE1 K SH AH0 N Z/
noun
  1. 1

    Compression; the packing together of loose matter

  2. 2

    Something packed together tightly; a mass of densely-packed matter

  3. 3

    A solid, immobile bulk of stool

  4. 4

    Failure of a tooth to erupt into the dental arch, because of adjacent teeth, dense overlying bone, excessive soft tissue, or other factor.

Source: https://en.wiktionary.org/wiki/impaction, https://en.wiktionary.org/wiki/impactions