any one of numerous aquatic pests of the family Notonectidae that swimming on the backs by way of broadened, oarlike hind legs.
some of different aquatic insects, associated with family Notonectidae, that swimming on the backs.
any of many predaceous aquatic pests associated with the household Notonectidae (such as for instance Notonecta undulata) that swim on their backs that will cause painful bites; -- also called motorboat bug.
Same as boat-fly.
predaceous aquatic pest that swims on its as well as may inflict painful bites
A theory or system of social reform which contemplates a complete reconstruction of society with a more just and equitable distribution of property and labor In popular usage the term is often employed to indicate any lawless revolutionary social scheme See Communism Fourierism Saint Simonianism forms of socialism...