clonic spasm

Origin

clonic spasm

noun Medicine/Medical.
See under spasm (def. 1).

Origin:
1840–50

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Clonic spasm is always a great word to know.
So is pelvis. Does it mean:
any of the bones of the wrist.
the basinlike cavity in the lower part of the trunk of many vertebrates, formed in humans by the innominate bones, sacrum, etc.
Dictionary.com Unabridged

spasm

[spaz-uhm]
noun
1.
Pathology. a sudden, abnormal, involuntary muscular contraction, consisting of a continued muscular contraction (tonic spasm) or of a series of alternating muscular contractions and relaxations (clonic spasm).
2.
any sudden, brief spell of great energy, activity, feeling, etc.

Origin:
1350–1400; Middle English spasme < Latin spasmus < Greek spasmós convulsion, derivative of spân to draw a sword or cord, wrench (off), convulse


2. fit, storm, flash, spurt.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Etymonline
Word Origin & History

spasm
c.1400, from O.Fr. spasme, from L. spasmus "a spasm," from Gk. spasmos "a spasm, convulsion," from span "draw up, tear away, contract violently, pull," from PIE *spe- "stretch." Fig. sense of "a sudden convulsion" (of emotion, politics, etc.) is attested from 1817. The verb is recorded from 1900.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

clonic spasm n.
Alternate involuntary contraction and relaxation of a muscle.

spasm (spāz'əm)
n.

  1. A sudden involuntary contraction of a muscle or group of muscles.

  2. A muscle spasm.

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