tonic spasm

tonic spasm

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

Origin:
1825–35

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.
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World English Dictionary
spasm (ˈspæzəm)
 
n
1.  an involuntary muscular contraction, esp one resulting in cramp or convulsion
2.  a sudden burst of activity, emotion, etc
 
[C14: from Latin spasmus, from Greek spasmos a cramp, from span to tear]

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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

spasm (spāz'əm)
n.

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

  2. A muscle spasm.

tonic spasm n.
A continuous involuntary muscular contraction. Also called entasia.

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