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locoweed

[loh-koh-weed]
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noun
  1. any of various leguminous plants of the genera Astragalus and Oxytropis, of the southwestern U.S. and Mexico, causing locoism in sheep, horses, etc.

Origin of locoweed

An Americanism dating back to 1875–80; loco + weed1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for locoweed

locoweed

noun
  1. any of several perennial leguminous plants of the genera Oxytropis and Astragalus of W North America that cause loco disease in horses, cattle, and sheep
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012