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feather grass
feather grassn. Any of various grasses, especially of the genera Nassella and Stipa, having feathery spikelets with sharp awns. Also called needle grass, spear grass.feather grass n (Plants) a perennial grass, Stipa pennata, native to the steppes of Europe and N Asia, cultivated as an ornament for its feathery inflorescence TranslationsEncyclopediaSeeStipa |