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lock-jaw

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lock⋅jaw

[lok-jaw]
–noun Pathology.
tetanus in which the jaws become firmly locked together; trismus.

Origin:
1795–1805; lock 1 + jaw
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Word Origin & History

lock-jaw 
1803, earlier locked-jaw (1765), popular name for trismus, also applied to tetanus, from lock (1) + jaw.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: lock·jaw
Pronunciation: 'läk-"jo
Function: noun
: an early symptom of tetanus characterized by spasm of the jaw muscles and inabilityto open the jaws; also : TETANUS 1a
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

lockjaw lock·jaw (lŏk'jô')
n.

  1. See tetanus.

  2. See trismus.

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