noun Pathology.
hyperexcitability of the vagus nerve, producing bradycardia, decreased heart output, and faintness.

1910–15; vago- + -tonia

vagotonic [vey-guh-ton-ik] , adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
vagotonia (ˌveɪɡəˈtəʊnɪə)
pathological overactivity of the vagus nerve, affecting various bodily functions controlled by this nerve
[C19: from vag(us) + -tonia, from Latin tonus tension, tone]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

vagotonia va·go·to·ni·a (vā'gə-tō'nē-ə)
Overactivity or irritability of the vagus nerve, adversely affecting function of the blood vessels, stomach, and muscles. Also called sympathetic imbalance.

va'go·ton'ic (-tŏn'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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