Source : WordNet®

silvery spleenwort
     n 1: fern with elongate silvery outgrowths enclosing the
          developing spores [syn: {Deparia acrostichoides}, {Athyrium
          thelypteroides}]
     2: North American fern with narrow fronds on yellowish
        leafstalks [syn: {glade fern}, {narrow-leaved spleenwort},
         {Athyrium pycnocarpon}, {Diplazium pycnocarpon}]