of the nature of or characterized by convulsions or spasms.
producing or accompanied by convulsion: convulsive rage.

1605–15; < Latin convulsīvus. See convulse, -ive

convulsively, adverb
convulsiveness, noun
postconvulsive, adjective
unconvulsive, adjective
unconvulsively, adverb
unconvulsiveness, noun

1. spasmodic. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
convulse (kənˈvʌls)
vb (often foll by with)
1.  (tr) to shake or agitate violently
2.  (tr) to cause (muscles) to undergo violent spasms or contractions
3.  informal to shake or be overcome (with violent emotion, esp laughter)
4.  (tr) to disrupt the normal running of (a country, etc): student riots have convulsed India
[C17: from Latin convulsus, from convellere to tear up, from vellere to pluck, pull]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1610s, from M.L. *convulsivus, from convuls-, pp. stem of convellere (see convulse (v.)) + -ive. Related: Convulsively.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

convulsive con·vul·sive (kən-vŭl'sĭv)

  1. Characterized by or having the nature of convulsions.

  2. Having or producing convulsions.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
These convulsive jolts occur as the dozen or so ambulatory slabs that make up the surface grind past one another.
They are mandarins masquerading as barbarians in the wishful service of convulsive beauty.
Eli then falls into a convulsive fit and rises born again as the prophet.
Electro-convulsive therapy abated his depression, along with the last vestiges of his desire to write.
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