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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Buckwheat This fast-growing non-wheat crop is excellent at suppressing weeds like quack grass. — Sunset, "Top 10 Cover Crops for Your Fall Garden," 22 Jan. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'quack grass.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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The first known use of quack grass was circa 1818

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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