stonewort

Definitions of stonewort
  1. noun
    any of various submerged aquatic algae of the genus Chara having nodes with whorled filamentlike branches; usually encrusted with calcium carbonate deposits
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    type of:
    chlorophyte, green algae
    algae that are clear green in color; often growing on wet ricks or damp wood or the surface of stagnant water
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