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irruption

[ih-ruhp-shuh n] /ɪˈrʌp ʃən/
noun
1.
a breaking or bursting in; a violent incursion or invasion.
2.
Ecology. a sudden increase in an animal population.
Origin
1570-1580
1570-80; < Latin irruptiōn- (stem of irruptiō), equivalent to irrupt(us), past participle of irrumpere to burst into (see ir-1, rupture) + -iōn- -ion
Can be confused
eruption, irruption.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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irruptions in Medicine

irruption ir·rup·tion (ĭ-rŭp'shən)
n.
The act or process of breaking through to a surface.

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