water beetle

English Thesaurus

1. any of numerous aquatic beetles usually having a smooth oval body and flattened hind legs for swimming (noun.animal)

hypernym	:	beetle,
definition	:	insect having biting mouthparts and front wings modified to form horny covers overlying the membranous rear wings (noun.animal)

member meronym	:	dytiscidae, family dytiscidae,
definition	:	water beetles (noun.animal)