Wa·ter boat·man Zool. A boat bug.
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Boat bug Zool. An aquatic hemipterous insect of the genus Notonecta; -- so called from swimming on its back, which gives it the appearance of a little boat. Called also boat fly, boat insect, boatman, and water boatman.
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water boatman
n : carnivorous aquatic bug having paddle-like hind legs [syn: boat
bug]