Noun water buttercup has 1 sense
  1. water crowfoot, water buttercup, Ranunculus aquatilis - plant of ponds and slow streams having submerged and floating leaves and white flowers; Europe and North America
    --1 is a kind of aquatic plant, water plant, hydrophyte, hydrophytic plant
    --1 is a member of Ranunculus, genus Ranunculus
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