quack grass

noun \ ˈkwak- \

Definition of quack grass

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

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Origin and Etymology of quack grass

alteration of quick (grass), alteration of quitch (grass)

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First Known Use: circa 1818

in the meaning defined above

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Medical Dictionary

quack grass

noun

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