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ryegrass

[rahy-gras, -grahs] /ˈraɪˌgræs, -ˌgrɑs/
noun
1.
any of several European grasses of the genus Lolium, as L. perenne (perennial ryegrass) grown for forage in the U.S.
Origin
1740-1750
1740-50; rye1 + grass
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for rye-grass

rye-grass

noun
1.
any of various grasses of the genus Lolium, esp L. perenne, native to Europe, N Africa, and Asia and widely cultivated as forage crops. They have a flattened flower spike and hairless leaves
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for rye-grass

ryegrass

any of about 10 species constituting the genus Lolium (family Poaceae), which includes forage and lawn grasses of temperate Eurasia and the noxious weed known as darnel (L. temulentum). Ryegrasses are about 0.3 to 1 m (1 to 3 feet) tall and have tough, dark green leaves. The flower spikelets grow in the angles of a zigzag rachis (flower stem). Both perennial ryegrass (L. perenne) and Italian ryegrass (L. multiflorum) germinate early and are important constituents of pasture and lawn-seed mixtures.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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