CONVULSIVE

convulsive, spasmodic, spastic

(adjective) affected by involuntary jerky muscular contractions; resembling a spasm; “convulsive motions”; “his body made a spasmodic jerk”; “spastic movements”

convulsive

(adjective) resembling a convulsion in being sudden and violent; “a convulsive rage”; “convulsive laughter”

Source: WordNet® 3.1

Etymology

Adjective

convulsive (comparative more convulsive, superlative most convulsive)

Marked by or having the nature of convulsions.

Having or producing convulsions.

Source: Wiktionary

Con*vul"sive, a. Etym: [Cf. F. convulsif.]

Definition: Producing, or attended with, convulsions or spasms; characterized by convulsions; convulsionary. An irregular, convulsive movement may be necessary to throw off an irregular, convulsive disease. Burke.

Source: Webster’s Unabridged Dictionary 1913 Edition