insertion

(in-sĕr′shŏn )

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[L. insertio, a putting in]

1. The movable attachment of the distal end of a muscle, which produces changes in shape or skeletal movement when the muscle contracts.
2. Placing or implanting of something into something else, as, in dentistry, of a filling or inlay in a cavity preparation or of dentures or other devices in the mouth.

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