water nymph

from WordNet (r) 3.0 (2006)

water nymph
    n 1: submerged aquatic plant having narrow leaves and small
         flowers; of fresh or brackish water [syn: {naiad}, {water
         nymph}]
    2: a water lily having large leaves and showy fragrant flowers
       that float on the water; of temperate and tropical regions
       [syn: {water nymph}, {fragrant water lily}, {pond lily},
       {Nymphaea odorata}]
    3: (Greek mythology) any nymph of the water
    4: a fairy that inhabits water [syn: {water sprite}, {water
       nymph}, {water spirit}]

from The Collaborative International Dictionary of English v.0.48

Water nymph \Wa"ter nymph`\
   1. (Myth.) A goddess of any stream or other body of water,
      whether one of the Naiads, Nereids, or Oceanides.
      [1913 Webster]

   2. (Bot.) A water lily ({Nymphaea}).
      [1913 Webster]