Noun witch grass has 2 senses
  1. witchgrass, witch grass, old witchgrass, old witch grass, tumble grass, Panicum capillare - North American grass with slender brushy panicles; often a weed on cultivated land
    --1 is a kind of panic grass
  2. dog grass, couch grass, quackgrass, quack grass, quick grass, witch grass, witchgrass, Agropyron repens - European grass spreading rapidly by creeping rhizomes; naturalized in North America as a weed
    --2 is a kind of wheatgrass, wheat-grass
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