tremor

[trem-er, tree-mer]
noun
1.
involuntary shaking of the body or limbs, as from disease, fear, weakness, or excitement; a fit of trembling.
2.
any tremulous or vibratory movement; vibration: tremors following an earthquake.
3.
a trembling or quivering effect, as of light.
4.
a quavering sound, as of the voice.

Origin:
1325–75; Middle English < Latin: a trembling, equivalent to trem(ere) to tremble + -or -or1

tremorous, adjective


1. shudder, shiver, quiver. 3. oscillation.
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Collins
World English Dictionary
tremor (ˈtrɛmə)
 
n
1.  an involuntary shudder or vibration, as from illness, fear, shock, etc
2.  any trembling or quivering movement
3.  a vibrating or trembling effect, as of sound or light
4.  Also called: earth tremor a minor earthquake
 
vb
5.  (intr) to tremble
 
[C14: from Latin: a shaking, from tremere to tremble, quake]
 
'tremorless
 
adj
 
'tremorous
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

tremor
late 14c., "terror," from O.Fr. tremor "fear, terror" (13c.), from L. tremorem (nom. tremor) "a trembling, terror," from tremere (see tremble). Sense of "an involuntary shaking" first recorded 1615 and probably represents a re-introduction from Latin.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

tremor trem·or (trěm'ər)
n.

  1. An involuntary trembling movement.

  2. Minute ocular movement occurring during fixation on an object.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
tremor   (trěm'ər)  Pronunciation Key 
  1. A relatively minor seismic shaking or vibrating movement. Tremors often precede larger earthquakes or volcanic eruptions.

  2. An involuntary shaking or trembling of the head or extremities that can be idiopathic or associated with any of various medical conditions, such as Parkinson's disease.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Essential tremor is a type of involuntary shaking movement in which no cause
  can be identified.
Drug-induced tremor is involuntary shaking due to the use of medication.
Familial tremor is an involuntary shaking movement that tends to run in
  families.
The ones that survived were wooden houses, since they were less stiff than the
  concrete ones and able to sway with the tremor.
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