Word Origin & History

"nervous disorder peculiar to Siberia, in which the patient mimics everything said or done by another," from Rus., lit. "to be epileptic."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

miryachit mir·ya·chit (mēr-yä'chĭt)
A nervous disease observed in Siberia, similar to latah.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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