[ gras-uh v-pahr-nas-uh s, grahs- ]
/ ˈgræs əv pɑrˈnæs əs, ˈgrɑs- /
any plant belonging to the genus Parnassia, of the saxifrage family, growing in marshy areas, having broad, smooth leaves and a single, pale flower.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for grass-of-parnassus
a herbaceous perennial N temperate marsh plant, Parnassia palustris, with solitary whitish flowers: family Parnassiaceae
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