imp action

impaction

[im-pak-shuhn]
noun
1.
an act or instance of impacting.
2.
the state of being impacted; close fixation.
3.
Dentistry. the condition in which a tooth is impacted.

Origin:
1730–40; < Late Latin impāctiōn- (stem of impāctiō), equivalent to Latin impāct(us), past participle of impingere (see impacted) + -iōn- -ion

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American Heritage
Medical Dictionary

impaction im·pac·tion (ĭm-pāk'shən)
n.
The process or condition of being impacted.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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