Noun: tumble grass túm-bul grãs
- North American grass with slender brushy panicles; often a weed on cultivated land
"Tumble grass seeds spread easily across fields when the dried plants break off and roll in the wind";
- witchgrass, witch grass, old witchgrass, old witch grass, Panicum capillare
Derived forms: tumble grasses
Type of: panic grass
Encyclopedia: Tumble grass