American Heritage® Dictionary of the English Language, Fourth Edition
- n. Couch grass.
GNU Webster's 1913
- (Bot.) A perennial grass (Agropyrum repens) having long running rootstalks, by which it spreads rapidly and pertinaciously, and so becomes a troublesome weed. Also called
couch grass, quack grass, quick grass, twitch grass. See Illustrationin Appendix.
- Middle English quich, from Old English cwice; see gwei- in Indo-European roots. (American Heritage® Dictionary of the English Language, Fourth Edition)
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