Impaction - Definition
impaction
n 1: the condition of being pressed closely together and firmly
fixed
2: a disorder in which feces are impacted in the lower colon
3: a disorder in which a tooth is so crowded in its socket that
it cannot erupt normally [syn: impaction, impacted tooth]
4: a sharp collision produced by striking or dashing against
something [syn: impingement, impaction]