n. Any of various usually evergreen bog plants of the genus Parnassia having broad smooth basal leaves and a single pale buttercuplike flower. Syn. -- parnassia, grass of Parnassus. [ WordNet 1.5 ]
(n) any of various usually evergreen bog plants of the genus Parnassia having broad smooth basal leaves and a single pale flower resembling a buttercup, Syn. grass-of-Parnassus