Notonecta undulata no·to·nec·taundulata uncommon noun 1. predaceous aquatic insect that swims on its back and may inflict painful bites SynonymsbackswimmerNotonecta undulata Related words Broader terms hemipterous insect Parts Notonecta WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
