Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Any of several leguminous plants of the genera Oxytropis and Astragalus of western North America that are poisonous to livestock.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Any of several plants indigenous to the western United States, of genus Oxytropis or Astragalus.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun any of several leguminous plants of western North America causing locoism in livestock
  • noun street names for marijuana

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

Spanish loco, "mad", "insane", and weed.

Examples

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