Any one of numerous species of aquatic beetles belonging to Dytiscus and allied genera of the family Dytiscidae, and to various genera of the family Hydrophilidae. These beetles swim with great agility, the fringed hind legs acting together like oars.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). water beetle. Retrieved September 26, 2026, from http://smartdefine.org/water_beetle/definitions/2080838 |
| Chicago | Webster's. 2011. "water beetle" http://smartdefine.org/water_beetle/definitions/2080838 (accessed September 26, 2026). |
| Harvard | Webster's 2011, water beetle, Smart Define, viewed 26 September, 2026, <http://smartdefine.org/water_beetle/definitions/2080838>. |
| MLA | Webster's. "water beetle" 28 May 2011. Web. 26 September 2026. <http://smartdefine.org/water_beetle/definitions/2080838> |