Water-beetle definition
Any of various aquatic beetles, especially the diving beetles of the family Dytiscidae, having a smooth oval body and flattened and fringed hind legs used for swimming.
noun
Any of various beetles that live in freshwater ponds and streams, sometimes having one or two pairs of swimming legs fringed and functioning as oars.
noun
Other Word Forms
Noun
Singular:
water-beetle
Plural:
water-beetles