[triz-muhs, tris-]
noun, plural trismuses. Pathology.
a spasm of the jaw muscles that makes it difficult to open the mouth.

1685–95; < Neo-Latin < Greek trismós a grinding

trismic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
trismus (ˈtrɪzməs)
pathol Nontechnical name: lockjaw the state or condition of being unable to open the mouth because of sustained contractions of the jaw muscles, caused by a form of tetanus
[C17: from New Latin, from Greek trismos a grinding]

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American Heritage
Medical Dictionary

trismus tris·mus (trĭz'məs)
A firm closing of the jaw due to tonic spasm of the muscles of mastication from disease of the motor branch of the trigeminal nerve. It is usually associated with general tetanus. Also called lockjaw.

The American Heritage® Stedman's Medical Dictionary
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