tremor

a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.

a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.

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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
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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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.

An involuntary trembling movement.
Minute ocular movement occurring during fixation on an object.

American Heritage

Science Dictionary

tremor

(trěm'ər) Pronunciation Key

A relatively minor seismic shaking or vibrating movement. Tremors often precede larger earthquakes or volcanic eruptions.
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.

Example sentences

His fear was painful to see: his hands were shaking and there was a noticeable tremor in his neck.

And the need for reliable sources of energy becomes more evident with every geopolitical tremor.

He insisted on driving, though his weakness and tremor defeated the mechanics of the right-hand turn.

Drug-induced tremor is involuntary shaking due to the use of medication.

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quiver shake teleseism thrilling trepidation

Matching Quote

"The only human beings I have thoroughly admired and respected in the world have been those who carried the load of the world with a smile, and who, in the face of anxieties that would have knocked me clean out, never showed a tremor. Such men and women end by owning us, soul and body, and our allegiance can never be shaken. We are only too glad to be owned. Religion is nothing but this."

-Henry Brooks Adams