Noun notonecta undulata has 1 sense
  1. backswimmer, Notonecta undulata - predaceous aquatic insect that swims on its back and may inflict painful bites
    --1 is a kind of hemipterous insect, bug, hemipteran, hemipteron
    --1 is a member of Notonecta, genus Notonecta
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