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(Plants) any grass of the genera Aira, Deschampsia, etc, having very narrow stems and leaves
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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|Noun||1.||hair grass - fine-leaved aquatic spike rush; popular as aerator for aquariums|
spike rush - a sedge of the genus Eleocharis
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