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trembles

British  
/ ˈtrɛmbəlz /

noun

  1. Also called: milk sickness.  a disease of cattle and sheep characterized by muscular incoordination and tremor, caused by ingestion of white snakeroot or rayless goldenrod

  2. a nontechnical name for Parkinson's disease

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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.