CONVULSION
convulsion
(noun) a physical disturbance such as an earthquake or upheaval
convulsion, turmoil, upheaval
(noun) a violent disturbance; “the convulsions of the stock market”
convulsion
(noun) violent uncontrollable contractions of muscles
paroxysm, fit, convulsion
(noun) a sudden uncontrollable attack; “a paroxysm of giggling”; “a fit of coughing”; “convulsions of laughter”
Source: WordNet® 3.1
Etymology
Noun
convulsion (plural convulsions)
(medicine) An intense, paroxysmal, involuntary muscular contraction.
An uncontrolled fit, as of laughter; a paroxysm.
Violent turmoil.
Source: Wiktionary
Con*vul"sion, n. Etym: [L. convulsio: cf. F. convulsion.]
1. (Med.)
Definition: An unnatural, violent, and unvoluntary contraction of the
muscular parts of an animal body.
2. Any violent and irregular motion or agitation; a violent shaking;
a tumult; a commotion.
Those two massy pillars, With horrible convulsion, to and fro He
tugged, he shook, till down they came. Milton.
Times of violence and convulsion. Ames.
Syn.
– Agitation; commotion; tumult; disturbance.
Source: Webster’s Unabridged Dictionary 1913 Edition