Search Result for "stonewort": 
Wordnet 3.0

NOUN (1)

1. any of various submerged aquatic algae of the genus Chara having nodes with whorled filamentlike branches; usually encrusted with calcium carbonate deposits; 



The Collaborative International Dictionary of English v.0.48:

Stonewort \Stone"wort`\, n. (Bot.)
   Any plant of the genus Chara; -- so called because they are
   often incrusted with carbonate of lime. See Chara.
   [1913 Webster]


WordNet (r) 3.0 (2006):

stonewort
    n 1: any of various submerged aquatic algae of the genus Chara
         having nodes with whorled filamentlike branches; usually
         encrusted with calcium carbonate deposits