Locoism

Part of speech: noun

Definitions

1. A disease affecting cattle, sheep, and horses that results from eating locoweed, causing weight loss, coordination problems, and erratic behavior
2. An illness in grazing animals caused by consuming plants of the genus Astragalus or Oxytropis, marked by neurological symptoms and physical deterioration
3. A poisoning condition in livestock stemming from ingestion of locoweed, characterized by loss of coordination, strange behavior, and progressive debilitation

Etymology: "Locoism" is a plain compound: "loco," from Spanish "loco" meaning "crazy" or "mad," joined to the English suffix "-ism," which forms nouns for a practice, condition or doctrine. The term refers to the disease of livestock poisoning caused by locoweed, a group of plants in the Astragalus and Oxytropis genera found on the western plains of North America. Animals that graze on it develop erratic, staggering behaviour, and the name reflects that look of madness. The Spanish word itself traces to Latin "lucus" in some older accounts, but that connection is not secure, so the clearest point is that "loco" was borrowed into the American West from the Spanish spoken there, where ranchers and herders observed the animals' symptoms. The English coinage follows the same logic as other "-ism" nouns for diseases and conditions, applying a recognisable Spanish adjective to a new phenomenon.