Dictionary![]() ![]() va•go•to•ni•aPronunciation: (vā"gu-tō'nē-u), [key] —n. Pathol. hyperexcitability of the vagus nerve, producing bradycardia, decreased heart output, and faintness. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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