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quack grass

noun \ˈkwak-\

Definition of QUACK GRASS

:  a European grass (Elytrigia repens syn. Agropyron repens) that is naturalized throughout North America and spreads by creeping rhizomes —called also couch grass, quitch, twitch, witchgrass

Origin of QUACK GRASS

alteration of quick (grass), alteration of quitch (grass)
First Known Use: circa 1818

quack grass

noun    (Medical Dictionary)

Medical Definition of QUACK GRASS

:  a European grass of the genus Agropyron (A. repens) that is naturalized throughout North America and has roots and rhizome with diuretic properties—called also couch grass, quitch, twitch, witchgrass

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