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retrusion

[ri-troo-zhuh n, -shuh n] /rɪˈtru ʒən, -ʃən/
noun, Dentistry.
1.
the act of moving a tooth backward.
2.
a condition characterized by the backward displacement of a tooth or teeth.
Origin of retrusion
1650-1660
1650-60; < Latin retrūs(us) removed, concealed (past participle of retrūdere; see retrude) + -ion
Related forms
retrusive
[ri-troo-siv] /rɪˈtru sɪv/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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retrusion in Medicine

retrusion re·tru·sion (rĭ-trōō'zhən)
n.
Retraction from any given point, especially the backward movement of the mandible.

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