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The state of being hypertonic.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Medicine) med an unusual increase in muscle tension making stretching difficult or impossible
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
hy•per•to•ni•a(ˌhaɪ pərˈtoʊ ni ə)
increased rigidity, tension, and spasticity of the muscles.
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|Noun||1.||hypertonia - (of muscular tissue) the state of being hypertonic|
tonicity, tonus, tone - the elastic tension of living muscles, arteries, etc. that facilitate response to stimuli; "the doctor tested my tonicity"
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