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[dis-in-tuh-grey-shuh n] /dɪsˌɪn təˈgreɪ ʃən/
the act or process of disintegrating.
Physics. decay (def 8).
Origin of disintegration
First recorded in 1790-1800; disintegrate + -ion
Related forms
nondisintegration, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Word Origin and History for disintegration

1796, noun of action from disintegrate.

Online Etymology Dictionary, © 2010 Douglas Harper
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disintegration in Medicine

disintegration dis·in·te·gra·tion (dĭs-ĭn'tĭ-grā'shən)

  1. The breaking up of the component parts of a substance, as in catabolism or decay.

  2. The disorganization or disruption of mental processes in mental illness.

  3. The natural or induced transformation of an atomic nucleus from a more massive to a less massive configuration by the emission of particles or radiation.

dis·in'te·grate' v.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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