See under spasm(def 1).
Origin of clonic spasm
First recorded in 1840–50
Definition for clonic spasm (2 of 2)
[ spaz-uhm ]
/ ˈspæz əm /
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).
any sudden, brief spell of great energy, activity, feeling, etc.
Origin of spasm
1350–1400; Middle English spasme < Latin spasmus < Greek spasmós convulsion, derivative of spân to draw a sword or cord, wrench (off), convulse
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for clonic spasm
/ (ˈspæzəm) /
an involuntary muscular contraction, esp one resulting in cramp or convulsion
a sudden burst of activity, emotion, etc
Word Origin for spasm
C14: from Latin spasmus, from Greek spasmos a cramp, from span to tear
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Medicine definitions for clonic spasm (1 of 2)
[ spăz′əm ]
A sudden involuntary contraction of a muscle or group of muscles.
A muscle spasm.
Medicine definitions for clonic spasm (2 of 2)
Alternate involuntary contraction and relaxation of a muscle.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.