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more about impaction
impaction |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Impaction \Im*pac"tion\, n. [L. impactio a striking : cf F. impaction.] 1. (Surg.) 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. 2. 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. From WordNet r 1.6 [wn]: impaction n 1: a condition in which a tooth is so crowded in its socket that it cannot erupt normally [syn: {impacted tooth}] 2: a sharp collision produced by striking or dashing against something [syn: {impingement}]
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