backswimmer

Từ điển WordNet v3.1 - WordNet Dictionary

noun

predaceous aquatic insect that swims on its back and may inflict painful bites
• Syn:
Notonecta undulata
• Hypernyms:
hemipterous insect, bug, hemipteran, hemipteron
• Member Holonyms:
Notonecta, genus Notonecta