locoweed definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of several perennial plants (genera Astragalus and Oxytropis) of the pea family, which are common in W North America and cause the loco disease of cattle, sheep, and, esp., horses
locoweed definition by American Heritage Dictionary
Any of several plants of the genera Oxytropis and Astragalus in the pea family, which are widespread in the western and central United States and cause severe poisoning when eaten by livestock. Also called crazyweed, loco1.