"impactions" in the noun sense
1. impaction
the condition of being pressed closely together and firmly fixed
2. impaction
a disorder in which feces are impacted in the lower colon
3. impaction, impacted tooth
a disorder in which a tooth is so crowded in its socket that it cannot erupt normally
4. impingement, impaction
a sharp collision produced by striking or dashing against something
Source: WordNet® (An amazing lexical database of English)
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