tonus

Pronunciation:		'townus
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WordNet Dictionary

	Definition:	[n] the elastic tension of living muscles, arteries, etc. that facilitate response to stimuli; "the doctor tested my tonicity"

	Synonyms:	tone, tonicity

	Antonyms:	amyotonia, atonia, atonicity, atony

	See Also:	catatonia, muscle tone, muscular tonus, myotonia, tautness, tenseness, tension, tensity

Webster's 1913 Dictionary

	Definition:	\To"nus\, n. [L. a sound, tone. See {Tone}.] (Physiol.) Tonicity, or tone; as, muscular tonus.